Detecting Earth from distant star-based systems

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Star dims due to transiting exoplanet

There are several methods currently used by astronomers to detect distant exoplanets from Earth.[1] As well, some of these same methods, theoretically at least, may be used to detect the Earth as an exoplanet from distant star systems.

In October 2020, astronomers identified 508 stars (with likely related exoplanetary systems) within 326 light-years (100 parsecs) away that have a favorable positional vantage point—in relation to the Earth Transit Zone (ETZ)—of detecting Earth as an exoplanet transiting the Sun.[2][3][4][5] According to the researchers, the transit method is the most popular tool used to detect exoplanets and, additionally, the most common tool to spectroscopically analyze exoplanetary atmospheres.[2] As a result, the study, based on the transit method, will be useful in the search for life on exoplanets beyond our Solar System by the SETI program, Breakthrough Listen Initiative, as well as, upcoming exoplanetary TESS mission searches.[2]

See also[edit]

  • Exoplanetology
  • List of exoplanet search projects
  • Lists of exoplanets
  • Methods of detecting exoplanets
  • Nexus for Exoplanet System Science
  • Planetary science


  1. Staff (2020). "5 Ways to Find a Planet". NASA. Retrieved 24 October 2020.
  2. 2.0 2.1 2.2 Kaltenegger, L.; Pepper, J. (20 October 2020). "Which stars can see Earth as a transiting exoplanet?". Monthly Notices of the Royal Astronomical Society. 499 (1): L111–L115. doi:10.1093/mnrasl/slaa161. Retrieved 24 October 2020.
  3. Letzer, Rafi (22 October 2020). "Aliens on 1,000 nearby stars could see us, new study suggests". Live Science. Retrieved 24 October 2020.
  4. Friedlander, Blaine (21 October 2020). "Smile, wave: Some exoplanets may be able to see us, too". Cornell University. Retrieved 24 October 2020.
  5. Carter, Jamie (22 October 2020). "Are We Being Watched? There Are 509 Star Systems With A Great View Of Life On Earth, Say Scientists". Forbes. Retrieved 24 October 2020.

External links[edit]

Others articles of the Topics Astronomy AND Space : Generic object of dark energy, Orbit-Vis

Others articles of the Topic Astronomy : List of largest stars, 2002 GN32, KOI-1686.01, RDUINOScope, Rigel, V838 Monocerotis, Beta Ursae Majoris

Others articles of the Topic Biology : Fossil Taxon, AIM-HIGH trial, James "Jim" Bradley, Cacticalia, Allen Shofe

Others articles of the Topic Space : Aliya Prokofyeva, Generic object of dark energy, Orbit-Vis

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