Extrasolar planet: References & Edit History
More Articles On This Topic
- 51 Pegasi
- astrobiology
- Beta Pictoris
- StarBinaries and extrasolar planetary systems
- PlanetPlanets of other stars
- 51 Pegasi b
- Eclipse
- Gliese 581
- Habitable zone
- HD 209458b
- How will the Nancy Grace Roman Space Telescope discover new exoplanets?
- HR 8799
- Solar systemStudies of other solar systems
- Today in History—July 23NASA Discovers an Earthlike Planet
- Kepler
- Nancy Grace Roman Space Telescope
- Spitzer Space Telescope
- Super-Earth
- TransitTransits of extrasolar planets
Article Contributors
Primary Contributors
-
Jack J. Lissauer
Space Scientist, NASA Ames Research Center, Moffett Field, Calif.
Other Contributors
- Gerald Vandergrift
Other Encyclopedia Britannica Contributors
Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Article title updated for style. | Nov 10, 2026 | ||
| Add new Web site: PNAS - Extrasolar planets. | Sep 12, 2026 | ||
| Add new Web site: CUNY Pressbooks Network - Astrobiology - Exoplanets: Statistics and Modern Discoveries. | Mar 06, 2026 | ||
| Article revised and updated. | Sep 18, 2025 | ||
| Add new Web site: Journal of Emerging Technologies and Innovative Research - Comparative Analysis of Exoplanets: A Case Study of Earth and Kepler-45 (PDF). | Mar 01, 2025 | ||
| Add new Web site: The Planetary Society - Exoplanets, worlds beyond the Solar System. | Nov 12, 2024 | ||
| Add new Web site: European Space Agency - How to find an extrasolar planet. | Apr 13, 2024 | ||
| Add new Web site: Live Science - Exoplanets: Alien worlds beyond our solar system. | Jun 16, 2023 | ||
| Add new Web site: Physics LibreTexts - Exoplanets. | Feb 25, 2023 | ||
| Add new Web site: Space.com - Exoplanets: Worlds Beyond Our Solar System. | Dec 19, 2022 | ||
| Article revised and updated. | Jul 29, 2022 | ||
| Removed media. | Nov 15, 2021 | ||
| Article revised and updated. | Feb 12, 2020 | ||
| Article revised and updated. | Oct 08, 2019 | ||
| Removed table. | Jul 30, 2018 | ||
| Media added. | Aug 11, 2017 | ||
| Media added. | Jun 16, 2017 | ||
| Added material about the TRAPPIST-1 system. | Feb 24, 2017 | ||
| Updated the number of extrasolar planets. Added material about the number of planets discovered by Kepler. | May 11, 2016 | ||
| Media added. | May 11, 2016 | ||
| Added video. | Jan 05, 2016 | ||
| Added video about how to find extrasolar planets. | Nov 24, 2015 | ||
| Number of discovered extrasolar planets updated to 2,000, and number of candidate planets updated to more than 4,000. | Jul 17, 2015 | ||
| Add new Web site: NASA - Kepler Discoveries. | Jan 28, 2015 | ||
| Add new Web site: NASA - Kepler Discoveries. | Jan 28, 2015 | ||
| Updated the number of extrasolar planets. |
|
Oct 14, 2014 | |
| Photograph of Fomalhaut removed. | May 09, 2012 | ||
| Added discussion of Earth-sized planets, Kepler-20e and Kepler-20f. | Dec 20, 2011 | ||
| Updated for discovery of Kepler-22b. Number of candidate planets observed by Kepler, number of Kepler candidates within the habitable zone, and number of Kepler candidates smaller than 2 Earth radii updated. | Dec 06, 2011 | ||
| Add new Web site: NeoK12 - Educational Videos and Games for School Kids - Exoplanet. | Nov 03, 2011 | ||
| Add new Web site: ThinkQuest - Extrasolar Planets. | Aug 26, 2011 | ||
| Add new Web site: Hyperphysics - Extrasolar Planets. | Aug 26, 2011 | ||
| Updated for discovery of free-floating planets. | May 19, 2011 | ||
| Information added about candidate planets discovered by Kepler. | Feb 03, 2011 | ||
| Number of extrasolar planets updated from "more than 400" to "more than 500." | Dec 03, 2010 | ||
| Article revised and updated. | Apr 30, 2010 | ||
| Number of extrasolar planets updated to more than 400. | Oct 21, 2009 | ||
| Mass of smallest planet updated. | Apr 29, 2009 | ||
| Media added. | Mar 17, 2009 | ||
| Media added. | Apr 30, 2008 | ||
| New article added. | Nov 05, 2007 |
View Changes:
Article History
Revised:
By: