Spitzer Space Telescope

Source: Wikipedia, the free encyclopedia.

Spitzer Space Telescope
An artist rendering of the Spitzer Space Telescope.
NamesSpace Infrared Telescope Facility
Mission typeInfrared space telescope
OperatorNASA / JPL / Caltech
COSPAR ID2003-038A Edit this at Wikidata
SATCAT no.27871
Websitewww.spitzer.caltech.edu
Mission durationPlanned: 2.5 to 5+ years[1]
Primary mission: 5 years, 8 months, 19 days
Final: 16 years, 5 months, 4 days
Spacecraft properties
ManufacturerLockheed
Ball Aerospace
Launch mass950 kg (2,094 lb)[1]
Dry mass884 kg (1,949 lb)
Payload mass851.5 kg (1,877 lb)[1]
Power427 W[2]
Start of mission
Launch date25 August 2003, 05:35:39 (2003-08-25UTC05:35:39) 
SLC-17B
Entered service18 December 2003
End of mission
DisposalDeactivated in Earth-trailing orbit
Deactivated30 January 2020[5]
Orbital parameters
Reference systemHeliocentric[1]
RegimeEarth-trailing[1]
Eccentricity0.011[6]
Perihelion altitude1.003 AU[6]
Aphelion altitude1.026 AU[6]
Inclination1.13°[6]
Period373.2 days[6]
Epoch16 March 2017 00:00:00
Main telescope
TypeRitchey–Chrétien[7]
Diameter0.85 m (2.8 ft)[1]
Focal length10.2 m (33 ft)
Wavelengthsinfrared, 3.6–160 μm[8]
← Chandra
 
Infrared observations can see objects hidden in visible light, such as HUDF-JD2, shown. This shows how the Spitzer IRAC camera was able to see beyond the wavelengths of Hubble's instruments.

The Spitzer Space Telescope, formerly the Space Infrared Telescope Facility (SIRTF), is an

Kepler
planet-finder.

The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009.[10] Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments were no longer usable. However, the two shortest-wavelength modules of the IRAC camera continued to operate with the same sensitivity as before the helium was exhausted, and continued to be used into early 2020 in the Spitzer Warm Mission.[11][12]

During the warm mission, the two short wavelength channels of IRAC operated at 28.7 K and were predicted to experience little to no degradation at this temperature compared to the nominal mission. The Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).

In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named by a board of scientists, typically after famous deceased astronomers, the new name for SIRTF was obtained from a contest open to the general public. The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s.[13] Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology.[14][15] He has been cited for his pioneering contributions to rocketry and astronomy, as well as "his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program."[13]

The US$776 million

"Earth-trailing" orbit[1]
).

The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and was cooled to 5.5 K (−268 °C; −450 °F). The satellite contains three instruments that allowed it to perform astronomical imaging and photometry from 3.6 to 160 micrometers, spectroscopy from 5.2 to 38 micrometers, and spectrophotometry from 55 to 95 micrometers.[8]

History

By the early 1970s, astronomers began to consider the possibility of placing an infrared telescope above the obscuring effects of Earth's atmosphere. In 1979, a report from the National Research Council of the National Academy of Sciences, A Strategy for Space Astronomy and Astrophysics for the 1980s, identified a Shuttle Infrared Telescope Facility (SIRTF)[17] as "one of two major astrophysics facilities [to be developed] for Spacelab", a shuttle-borne platform. Anticipating the major results from an upcoming Explorer satellite and from the Shuttle mission, the report also favored the "study and development of ... long-duration spaceflights of infrared telescopes cooled to cryogenic temperatures[18]."

The launch in January 1983 of the Infrared Astronomical Satellite, jointly developed by the United States, the Netherlands, and the United Kingdom, to conduct the first infrared survey of the sky, whetted the appetites of scientists worldwide for follow-up space missions capitalizing on the rapid improvements in infrared detector technology.

Earlier infrared observations had been made by both space-based and ground-based

atmosphere and the telescope itself will radiate (glow) brightly. Additionally, the atmosphere is opaque at most infrared wavelengths. This necessitates lengthy exposure times and greatly decreases the ability to detect faint objects. It could be compared to trying to observe the stars in the optical at noon from a telescope built out of light bulbs. Previous space observatories (such as IRAS, the Infrared Astronomical Satellite, and ISO
, the Infrared Space Observatory) were launched during the 1980s and 1990s and great advances in astronomical technology have been made since then.

The SIRTF in a Kennedy Space Center clean room.
The launch of SIRTF in 2003 aboard the 300th Delta rocket.

Most of the early concepts envisioned repeated flights aboard the NASA Space Shuttle. This approach was developed in an era when the Shuttle program was expected to support weekly flights of up to 30 days duration. A May 1983 NASA proposal described SIRTF as a Shuttle-attached mission, with an evolving scientific instrument payload. Several flights were anticipated with a probable transition into a more extended mode of operation, possibly in association with a future space platform or space station. SIRTF would be a 1-meter class, cryogenically cooled, multi-user facility consisting of a telescope and associated focal plane instruments. It would be launched on the Space Shuttle and remain attached to the Shuttle as a Spacelab payload during astronomical observations, after which it would be returned to Earth for refurbishment prior to re-flight. The first flight was expected to occur about 1990, with the succeeding flights anticipated beginning approximately one year later. However, the Spacelab-2 flight aboard STS-51-F showed that the Shuttle environment was poorly suited to an onboard infrared telescope due to contamination from the relatively "dirty" vacuum associated with the orbiters. By September 1983, NASA was considering the "possibility of a long duration [free-flyer] SIRTF mission".[19][20]

Spitzer is the only one of the

Great Observatories not launched by the Space Shuttle, as was originally intended[citation needed]. However, after the 1986 Challenger disaster, the Shuttle-Centaur upper stage, which would have been required to place it into its final orbit, was abandoned. The mission underwent a series of redesigns during the 1990s, primarily due to budget considerations. This resulted in a much smaller but still fully capable mission that could use the smaller Delta II expendable launch vehicle.[21]

Animation of Spitzer Space Telescope
Around the Earth
Around the Sun - Frame rotating with the Earth
   Spitzer Space Telescope  ·   Earth ·   Sun

One of the most important advances of this redesign was an Earth-trailing orbit.[1] Cryogenic satellites that require liquid helium (LHe, T ≈ 4 K) temperatures in near-Earth orbit are typically exposed to a large heat load from Earth, and consequently require large amounts of LHe coolant, which then tends to dominate the total payload mass and limits mission life. Placing the satellite in solar orbit far from Earth allowed innovative passive cooling. The sun shield protected the rest of the spacecraft from the Sun's heat, the far side of the spacecraft was painted black to enhance passive radiation of heat, and the spacecraft bus was thermally isolated from the telescope. All of these design choices combined to drastically reduce the total mass of helium needed, resulting in an overall smaller and lighter payload, resulting in major cost savings, but with a mirror the same diameter as originally designed. This orbit also simplified telescope pointing, but did require the NASA Deep Space Network for communications.[citation needed]

The primary instrument package (telescope and cryogenic chamber) was developed by

Caltech campus in Pasadena, California.[citation needed
]

Schematic view of Spitzer:
A Optics : 1 - secondary mirror; 3 - primary mirror; 2 - outer shell;
B Cryostat: 4 - instruments; 10 - helium tank;
C Service module: 5 - service module shield; 6 - star tracker; 7 - batteries; 8 - high-gain antenna; 9 - nitrogen tank;
D Solar panels

Launch and commissioning

Warm mission and end of mission

Spitzer ran out of liquid helium coolant on 15 May 2009, which stopped far-IR observations. Only the IRAC instrument remained in use, and only at the two shorter wavelength bands (3.6 μm and 4.5 μm). The telescope equilibrium temperature was then around 30 K (−243 °C; −406 °F), and IRAC continued to produce valuable images at those wavelengths as the "Spitzer Warm Mission".[24]

Late in the mission, ~2016, Spitzer's distance to Earth and the shape of its orbit meant the spacecraft had to pitch over at an extreme angle to aim its antenna at Earth.[25] The solar panels were not fully illuminated at this angle, and this limited those communications to 2.5 hours due to the battery drain.[26] The telescope was retired on 30 January 2020[5] when NASA sent a shutdown signal to the telescope from the Goldstone Deep Space Communications Complex (GDSCC) instructing the telescope to go into safe mode.[27] After receiving confirmation that the command was successful, Spitzer Project Manager Joseph Hunt officially declared that the mission had ended.[28]

Instruments

Cryogenic Telescope Assembly (CTA)

Spitzer carries three instruments on board:[29][30][31][32]

Infrared Array Camera (IRAC)
An infrared camera which operated simultaneously on four wavelengths (3.6 μm, 4.5 μm, 5.8 μm and 8 μm). Each module used a 256×256-pixel detector—the short-wavelength pair used
Center for Astrophysics | Harvard & Smithsonian; the flight hardware was built by NASA Goddard Space Flight Center
.
Infrared Spectrograph (IRS)
An infrared spectrometer with four sub-modules which operate at the wavelengths 5.3–14 μm (low resolution), 10–19.5 μm (high resolution), 14–40 μm (low resolution), and 19–37 μm (high resolution). Each module used a 128×128-pixel detector—the short-wavelength pair used arsenic-doped silicon blocked impurity band technology, the long-wavelength pair used antimony-doped silicon blocked impurity band technology.
Ball Aerospace
.
Multiband Imaging Photometer for Spitzer (MIPS)
Three detector arrays in the mid- to far-infrared (128 × 128 pixels at 24 
Ball Aerospace
.

All three instruments used liquid helium for cooling the sensors. Once the helium was exhausted, only the two shorter wavelengths in IRAC were used in the "warm mission".

A Henize 206 viewed by different instruments in March 2004. The separate IRAC and MIPS images are at right.

Results

While some time on the telescope was reserved for participating institutions and crucial projects, astronomers around the world also had the opportunity to submit proposals for observing time. Prior to launch, there was a proposal call for large, coherent investigations using Spitzer. If the telescope failed early and/or ran out of cryogen very quickly, these so-called Legacy Projects would ensure the best possible science could be obtained quickly in the early months of the mission. As a requirement tied to the funding these Legacy teams received, the teams had to deliver high-level data products back to the Spitzer Science Center (and the NASA/IPAC Infrared Science Archive) for use by the community, again ensuring the rapid scientific return of the mission. The international scientific community quickly realized the value of delivering products for others to use, and even though Legacy projects were no longer explicitly solicited in subsequent proposal calls, teams continued to deliver products to the community. The Spitzer Science Center later reinstated named "Legacy" projects (and later still "Exploration Science" projects) in response to this community-driven effort.[36]

Important targets included forming stars (young stellar objects, or YSOs), planets, and other galaxies. Images are freely available for educational and journalistic purposes.[37][38]

The Cepheus C & B Regions. – The Spitzer Space Telescope (30 May 2019).
IC 1396
.

The first released images from Spitzer were designed to show off the abilities of the telescope and showed a glowing stellar nursery, a big swirling, dusty

ESA images do for the Hubble Space Telescope
.

As one of its most noteworthy observations, in 2005, Spitzer became one of the first telescopes to directly capture light from

Cohen-kuhi Tau/4
had a planetary disk that was vastly younger and contained less mass than previously theorized, leading to new understandings of how planets are formed.

The Helix Nebula, blue shows infrared light of 3.6 to 4.5 micrometers, green shows infrared light of 5.8 to 8 micrometers, and red shows infrared light of 24 micrometers.

In 2004, it was reported that Spitzer had spotted a faintly glowing body that may be the youngest star ever seen. The telescope was trained on a core of gas and dust known as L1014 which had previously appeared completely dark to ground-based observatories and to ISO (Infrared Space Observatory), a predecessor to Spitzer. The advanced technology of Spitzer revealed a bright red hot spot in the middle of L1014.

Scientists from the University of Texas at Austin, who discovered the object, believe the hot spot to be an example of early star development, with the young star collecting gas and dust from the cloud around it. Early speculation about the hot spot was that it might have been the faint light of another core that lies 10 times further from Earth but along the same line of sight as L1014. Follow-up observation from ground-based near-infrared observatories detected a faint fan-shaped glow in the same location as the object found by Spitzer. That glow is too feeble to have come from the more distant core, leading to the conclusion that the object is located within L1014. (Young et al., 2004)

In 2005, astronomers from the University of Wisconsin at Madison and Whitewater determined, on the basis of 400 hours of observation on the Spitzer Space Telescope, that the Milky Way galaxy has a more substantial bar structure across its core than previously recognized.

An artificial color image of the Double Helix Nebula, thought to be generated at the galactic center by magnetic torsion 1000 times greater than the Sun's.

Also in 2005, astronomers

cosmic expansion.[40]

In March 2006, astronomers reported an 80-light-year long (25 pc) nebula near the center of the Milky Way Galaxy, the Double Helix Nebula, which is, as the name implies, twisted into a double spiral shape. This is thought to be evidence of massive magnetic fields generated by the gas disc orbiting the supermassive black hole at the galaxy's center, 300 light-years (92 pc) from the nebula and 25,000 light-years (7,700 pc) from Earth. This nebula was discovered by Spitzer and published in the magazine Nature on 16 March 2006.

In May 2007, astronomers successfully mapped the atmospheric temperature of HD 189733 b, thus obtaining the first map of some kind of an extrasolar planet.

Starting in September 2006, the telescope participated in a series of surveys called the

Serpens South, a cluster of 50 young stars in the Serpens
constellation.

The Andromeda Galaxy imaged by MIPS at 24 micrometers.

Scientists have long wondered how tiny silicate crystals, which need high temperatures to form, have found their way into frozen comets, born in the very cold environment of the Solar System's outer edges. The crystals would have begun as non-crystallized, amorphous silicate particles, part of the mix of gas and dust from which the Solar System developed. This mystery has deepened with the results of the

Wild 2
. Many of the Stardust particles were found to have formed at temperatures in excess of 1,000 K.

In May 2009, Spitzer researchers from Germany, Hungary, and the Netherlands found that amorphous silicate appears to have been transformed into crystalline form by an outburst from a star. They detected the infrared signature of forsterite silicate crystals on the disk of dust and gas surrounding the star EX Lupi during one of its frequent flare-ups, or outbursts, seen by Spitzer in April 2008. These crystals were not present in Spitzer's previous observations of the star's disk during one of its quiet periods. These crystals appear to have formed by radiative heating of the dust within 0.5 AU of EX Lupi.[41][42]

In August 2009, the telescope found evidence of a high-speed collision between two burgeoning planets orbiting a young star.[43]

In October 2009, astronomers Anne J. Verbiscer, Michael F. Skrutskie, and Douglas P. Hamilton published findings of the "

Phoebe ring" of Saturn, which was found with the telescope; the ring is a huge, tenuous disc of material extending from 128 to 207 times the radius of Saturn.[44]

GLIMPSE and MIPSGAL surveys

GLIMPSE, the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire, was a series of surveys that spanned 360° of the inner region of the Milky Way galaxy, which provided the first large-scale mapping of the galaxy.[45][46] It consists of more than 2 million snapshots taken in four separate wavelengths using the Infrared Array Camera.[47] The images were taken over a 10-year period beginning in 2003 when Spitzer launched.[48]

MIPSGAL, a similar survey that complements GLIMPSE, covers 248° of the galactic disk[49] using the 24 and 70 μm channels of the MIPS instrument.[50]

On 3 June 2008, scientists unveiled the largest, most detailed infrared portrait of the Milky Way, created by stitching together more than 800,000 snapshots, at the 212th meeting of the American Astronomical Society in St. Louis, Missouri.[51][52] This composite survey is now viewable with the GLIMPSE/MIPSGAL Viewer.[53]

2010s

An arrow points to the embryonic star HOPS-68, where scientists believe forsterite crystals are raining down onto the central dust disk.

Spitzer observations, announced in May 2011, indicate that tiny forsterite crystals might be falling down like rain on to the protostar HOPS-68. The discovery of the forsterite crystals in the outer collapsing cloud of the protostar is surprising because the crystals form at lava-like high temperatures, yet they are found in the molecular cloud where the temperatures are about −170 °C (103 K; −274 °F). This led the team of astronomers to speculate that the bipolar outflow from the young star may be transporting the forsterite crystals from near the star's surface to the chilly outer cloud.[54][55]

In January 2012, it was reported that further analysis of the Spitzer observations of EX Lupi can be understood if the forsterite crystalline dust was moving away from the protostar at a remarkable average speed of 38 kilometres per second (24 mi/s). It would appear that such high speeds can arise only if the dust grains had been ejected by a bipolar outflow close to the star.[56] Such observations are consistent with an astrophysical theory, developed in the early 1990s, where it was suggested that bipolar outflows garden or transform the disks of gas and dust that surround protostars by continually ejecting reprocessed, highly heated material from the inner disk, adjacent to the protostar, to regions of the accretion disk further away from the protostar.[57]

In April 2015, Spitzer and the Optical Gravitational Lensing Experiment were reported as co-discovering one of the most distant planets ever identified: a gas giant about 13,000 light-years (4,000 pc) away from Earth.[58]

An illustration of a brown dwarf combined with a graph of light curves from OGLE-2015-BLG-1319: Ground-based data (grey), Swift (blue), and Spitzer (red).

In June and July 2015, the

Swift, Spitzer, and the ground-based Optical Gravitational Lensing Experiment, the first time two space telescopes have observed the same microlensing event. This method was possible because of the large separation between the two spacecraft: Swift is in low-Earth orbit while Spitzer is more than one AU distant in an Earth-trailing heliocentric orbit.[1] This separation provided significantly different perspectives of the brown dwarf, allowing for constraints to be placed on some of the object's physical characteristics.[59]

Reported in March 2016, Spitzer and Hubble were used to discover the most distant-known galaxy, GN-z11. This object was seen as it appeared 13.4 billion years ago.[60][25]

Spitzer Beyond

On 1 October 2016, Spitzer began its Observation Cycle 13, a 2+1⁄2 year extended mission nicknamed Beyond. One of the goals of this extended mission was to help prepare for the James Webb Space Telescope, also an infrared telescope, by identifying candidates for more detailed observations.[25]

Another aspect of the Beyond mission was the engineering challenges of operating Spitzer in its progressing orbital phase. As the spacecraft moved farther from Earth on the same orbital path from the Sun, its antenna had to point at increasingly higher angles to communicate with ground stations; this change in angle imparted more and more solar heating on the vehicle while its solar panels received less sunlight.[25]

Planet hunter

An artist's impression of the TRAPPIST-1 system.

Spitzer was also put to work studying exoplanets thanks to creatively tweaking its hardware. This included doubling its stability by modifying its heating cycle, finding a new use for the "peak-up" camera, and analyzing the sensor at a sub-pixel level. Although in its "warm" mission, the spacecraft's passive cooling system kept the sensors at 29 K (−244 °C; −407 °F).

transit photometry and gravitational microlensing techniques to perform these observations.[25] According to NASA's Sean Carey, "We never even considered using Spitzer for studying exoplanets when it launched. ... It would have seemed ludicrous back then, but now it's an important part of what Spitzer does."[25]

Examples of exoplanets discovered using Spitzer include HD 219134 b in 2015, which was shown to be a rocky planet about 1.5 times as large as Earth in a three-day orbit around its star;[62] and an unnamed planet found using microlensing located about 13,000 light-years (4,000 pc) from Earth.[63]

In September–October 2016, Spitzer was used to discover five of a total of seven known planets around the star

transit method, Spitzer helped measure the sizes of the seven planets and estimate the mass and density of the inner six. Further observations will help determine if there is liquid water on any of the planets.[64]

See also

References

  1. ^ a b c d e f g h i "About Spitzer: Fast Facts". Jet Propulsion Laboratory. 2008. Archived from the original on 3 October 2023. Retrieved 22 April 2007.
  2. ^ "The Solar Panel Assembly". Jet Propulsion Laboratory. Archived from the original on 28 September 2023.
  3. ^ a b Harwood, William (25 August 2003). "300th Delta rocket launches new window on Universe". Spaceflight Now for CBS News. Archived from the original on 21 March 2023. Retrieved 1 December 2016.
  4. National Space Science Data Center. 2003-038A. Archived
    from the original on 24 September 2023. Retrieved 26 April 2015.
  5. ^ a b c Ending in 2020, NASA's Infrared Spitzer Mission Leaves a Gap in Astronomy. Jonathan O'Callaghan. Scientific American. June 4, 2019.
  6. ^ a b c d e "HORIZONS Web-Interface". Jet Propulsion Laboratory. Retrieved 16 March 2017.
  7. ^ "About Spitzer: Spitzer's Telescope". Jet Propulsion Laboratory. Archived from the original on 3 October 2023. Retrieved 22 April 2007.
  8. ^ a b Van Dyk, Schuyler; Werner, Michael; Silbermann, Nancy (March 2013) [2010]. "3.2: Observatory Description". Spitzer Telescope Handbook. Infrared Science Archive. Archived from the original on 10 April 2023. Retrieved 18 October 2015.
  9. ^ Mann, Adam (30 January 2020). "NASA's Spitzer Space Telescope Ends 16-Year Mission of Discovery". The New York Times. Archived from the original on 2 August 2023. Retrieved 4 February 2020.
  10. ^ Clavin, Whitney (15 May 2009). "NASA's Spitzer Begins Warm Mission" (Press release). Pasadena, California: Jet Propulsion Laboratory. ssc2009-12, jpl2009-086. Archived from the original on 3 January 2024. Retrieved 26 April 2015.
  11. doi:10.1063/1.2806787. Archived
    (PDF) from the original on 27 December 2023.
  12. ^ "Cycle-6 Warm Mission". Spitzer Science Center. Jet Propulsion Laboratory. Archived from the original on 4 July 2010. Retrieved 16 September 2009.
  13. ^ a b Applewhite, Denise (11 March 2004). "Lyman Spitzer Jr". Jet Propulsion Laboratory & Princeton University. Archived from the original on 21 January 2024. Retrieved 6 January 2009.
  14. ISBN 978-0-521-59291-8
    .
  15. ISBN 978-0-691-13297-6
    .
  16. ^ "Spitzer Space Telescope Fast Facts". Jet Propulsion Laboratory. Archived from the original on 14 February 2024. Retrieved 21 August 2020.
  17. ISBN 978-0-309-33285-9
    .
  18. ISBN 978-0-309-03249-0
    .
  19. ^ Watanabe, Susan (22 November 2007). "Studying the Universe in Infrared". NASA. Archived from the original on 7 July 2019. Retrieved 8 December 2007.
  20. ^ Kwok, Johnny (1 October 2006). "Finding a Way: The Spitzer Space Telescope Story". NASA ASK Magazine. No. 25. NASA. Archived from the original on 25 September 2022. Retrieved 9 December 2007.
  21. ISBN 0-8165-2558-7
    .
  22. ^ Kopec, Janet, ed. (8 January 2004). "Raytheon Technology Enables Superior Space Images From Spitzer Space Telescope" (Press release). Raytheon. Archived from the original on 9 August 2018.
  23. ^ Spitzer Science Center Home Page -- Public information.
  24. ^ Clavin, Whitney B.; Harrington, J. D. (5 August 2009). "NASA's Spitzer Sees the Cosmos Through 'Warm' Infrared Eyes" (Press release). NASA. 2009-116. Archived from the original on 26 March 2023. Retrieved 30 January 2016.
  25. ^ a b c d e f Landau, Elizabeth (25 August 2016). "Spitzer Space Telescope Begins 'Beyond' Phase" (Press release). Jet Propulsion Laboratory. 2016-221. Archived from the original on 20 February 2024. Retrieved 9 December 2016.
  26. ^ Cofield, Calla, ed. (13 June 2019). "How NASA's Spitzer Has Stayed Alive for So Long" (Press release). Jet Propulsion Laboratory. ssc2019-10. Archived from the original on 1 February 2024.
  27. ^ Oberhaus, Daniel (29 January 2020). "RIP Spitzer, the Coolest Heat Telescope in the Solar System". Wired. Archived from the original on 24 July 2023. Retrieved 29 January 2020.
  28. ^ Hautaluoma, Grey; Landau, Elizabeth; Cofield, Calla, eds. (30 January 2020). "NASA's Spitzer Space Telescope Ends Mission of Astronomical Discovery" (Press release). Jet Propulsion Laboratory. ssc2020-08. Archived from the original on 1 February 2024. Retrieved 10 February 2020.
  29. ^ "SSC Observatory general information page". Jet Propulsion Laboratory. Archived from the original on 6 February 2010. Retrieved 4 October 2009.
  30. ^ "SSC Observatory Overview". Jet Propulsion Laboratory. Archived from the original on 10 October 2009. Retrieved 4 October 2009.
  31. ^ SSC Science Information home page, 4 October 2009.
  32. ^ "Spitzer Observers' Manual - reference for technical instrument information, Ver 8". Archived from the original on 11 October 2009. Retrieved 15 August 2008.
  33. ^ "SSC IRAC (Mid IR camera) science users information page". Jet Propulsion Laboratory. Archived from the original on 1 November 2009. Retrieved 4 October 2009.
  34. ^ "SSC IRS (spectrometer) science users' information page". Jet Propulsion Laboratory. Archived from the original on 3 August 2009. Retrieved 4 October 2009.
  35. ^ "SSC MIPS (long wavelength 24um, 70um, & 160um) imaging photometer and spectrometer science users' information page". Jet Propulsion Laboratory. Archived from the original on 8 November 2009.
  36. ^ "Spitzer Documentation & Tools: Legacy Programs". NASA/IPAC Infrared Science Archive. NASA. Archived from the original on 10 December 2023. Retrieved 26 August 2020.
  37. ^ "IPAC Image Use Policy". NASA IPAC. Archived from the original on 1 February 2024. Retrieved 26 August 2020.
  38. ^ "Spitzer Space Telescope Images". Astropix. Retrieved 26 August 2020.
  39. ^ Press Release: NASA's Spitzer Marks Beginning of New Age of Planetary Science.
  40. ^ Infrared Glow of First Stars Found: Scientific American Archived 10 October 2007 at the Wayback Machine.
  41. ^ Clavin, Whitney (ed.). "Spitzer Catches Star Cooking Up Comet Crystals" (Press release). Jet Propulsion Laboratory. 2009-083. Archived from the original on 7 January 2024.
  42. S2CID 4426934
    .
  43. ^ "Traces of planet collision found". BBC News. 11 August 2009. Archived from the original on 10 December 2023.
  44. S2CID 4349726
    .
  45. ^ "NASA's Spitzer Telescope Brings 360-Degree View of Galaxy to Our Fingertips" (Press release). Jet Propulsion Laboratory. 20 March 2014. ssc2014-02. Archived from the original on 28 September 2023.
  46. ^ Cofield, Calla, ed. (25 August 2020). "Where Are Stars Made? NASA's Spitzer Spies a Hot Spot" (Press release). NASA & Jet Propulsion Laboratory. ssc2020-14. Archived from the original on 26 February 2024. Retrieved 31 August 2020.
  47. ^ Galactic Legacy Infrared Mid-Plane Survey Extraordinaire Archived 8 May 2021 at the Wayback Machine, University of Wisconsin–Madison Department of Astronomy
  48. ^ "GLIMPSE the Galaxy All the Way Around" (Press release). Jet Propulsion Laboratory. 20 March 2014. ssc2014-02a. Archived from the original on 26 December 2023. Retrieved 26 August 2020.
  49. ^ "A 24 and 70 Micron Survey of the Inner Galactic Disk with MIPS (MIPSGAL) Data Collection Atlas". NASA/IPAC Infrared Science Archive (IRSA). Retrieved 26 August 2020.
  50. ISBN 978-0-691-17554-6
    .
  51. ^ Clavin, Whitney, ed. (3 June 2008). "Spitzer Captures Stellar Coming of Age in Our Galaxy". www.spitzer.caltech.edu (Press release). Jet Propulsion Laboratory. ssc2008-11, jpl2008-095. Archived from the original on 28 September 2023.
  52. ^ "Released Images and Videos of Milky Way Mosaic". Archived from the original on 4 March 2016. Retrieved 11 May 2014.
  53. ^ "Glimpse". www.alienearths.org.
  54. ^ Clavin, Whitney; Perrotto, Trent, eds. (26 May 2011). "Spitzer Sees Crystal 'Rain' in Outer Clouds of Infant Star" (Press release). Jet Propulsion Laboratory. 2011-161. Archived from the original on 25 February 2024.
  55. S2CID 28545814. Archived
    from the original on 26 February 2024.
  56. S2CID 53550709
    .
  57. doi:10.1006/icar.1995.1126
    .
  58. ^ Howell, Elizabeth (16 April 2015). "Newfound Alien Planet Is One of the Farthest Ever Detected". Space.com. Archived from the original on 26 September 2023. Retrieved 14 December 2016.
  59. ^ Landau, Elizabeth (10 November 2016). "NASA Space Telescopes Pinpoint Elusive Brown Dwarf". NASA / Jet Propulsion Laboratory. Retrieved 18 December 2016.
  60. ^ "Hubble Team Breaks Cosmic Distance Record" (Press release). Jet Propulsion Laboratory. 3 March 2016. feature16-04. Archived from the original on 28 September 2023. Retrieved 14 December 2016.
  61. ^ Hadhazy, Adam (24 September 2013). "How Engineers Revamped Spitzer to Probe Exoplanets" (Press release). Jet Propulsion Laboratory. 2013-289. Archived from the original on 28 March 2023. Retrieved 14 December 2016.
  62. ^ Chou, Felicia; Clavin, Whitney B. (30 July 2015). "NASA's Spitzer Confirms Closest Rocky Exoplanet" (Press release). Jet Propulsion Laboratory. 2015-251. Archived from the original on 7 April 2023. Retrieved 15 December 2016.
  63. ^ Clavin, Whitney B.; Chou, Felicia (14 April 2015). "NASA's Spitzer Spots Planet Deep Within Our Galaxy" (Press release). Jet Propulsion Laboratory. 2015-128. Archived from the original on 20 February 2024. Retrieved 15 December 2016.
  64. ^ a b Chou, Felicia; Potter, Sean; Landau, Elizabeth (22 February 2017). "NASA Telescope Reveals Largest Batch of Earth-Size, Habitable-Zone Planets Around Single Star" (Press release). NASA. 17-015. Archived from the original on 16 February 2024. Retrieved 3 March 2017.
  65. PMID 28230125
    .
  66. S2CID 119103101
    .

Further reading

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=Spitzer_Space_Telescope&oldid=1219927404"