Solar gravitational lens

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Solar gravitational lens point

A solar gravitational lens or solar gravity lens (SGL) is a theoretical method of using the

exoplanets
.

The solar gravitational lens is characterized by remarkable properties: it offers brightness amplification of up to a factor of ~1011 (at 1 μm) and extreme angular resolution (~10−10 arcsec).[2]

Albert Einstein predicted in 1936 that rays of light from the same direction that skirt the edges of the Sun would converge to a focal point approximately 542 AUs from the Sun.[3] A probe positioned at this distance from the Sun could use it as a gravitational lens for magnifying distant objects on the opposite side of the Sun. The probe's location could shift around as needed to select different targets relative to the Sun. In 1979, Von Eshleman was the first author proposing to use the Sun as a large lens.[4]

A probe called SETIsail and later

ESA in 1993, but is expected to be a difficult task. If a probe does pass 542 AU, magnification capabilities of the lens will continue to act at farther distances, as the rays that come to a focus at larger distances pass further away from the distortions of the Sun's corona
.

In 2020,

solar sails (~16 vanes of 103 m2) to achieve the needed high velocity at perihelion (~150 km/sec), reaching 547 AU in 17 years.[6]

See also

References

  1. ^ Diaz, Jesus (16 August 2022). "These next-gen telescopes will make the James Webb look like a toy - Upcoming telescope designs will dwarf the resolution of the James Webb. One of them is coming very soon to a mountain in Chile. The other may take a century". Fast Company. Retrieved 17 August 2022.
  2. ^ a b Hall, Loura (2020-04-06). "Direct Multipixel Imaging and Spectroscopy of an Exoplanet". NASA. Retrieved 2020-08-05.
  3. PMID 17769014
    .
  4. S2CID 27692082
    .
  5. ^ Hall, Loura (2020-04-06). "NIAC 2020 Phase I, Phase II and Phase III Selections". NASA. Retrieved 2020-08-05.
  6. arXiv:2002.11871 [astro-ph.IM
    ].
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