Exoplanet

Quick Facts: Who was Exoplanet?

Subject:

Exoplanet

Known for:

A planet orbiting a star outside our own Solar System.

Verified Source:

2Day Chrono-Wiki & Primary Historical Archives

Origins & Early Life

An exoplanet or extrasolar planet is a planet outside the Solar System. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995. A different planet, first detected in 1988, was confirmed in 2003. In 2016, it was recognized that the first possible evidence of an exoplanet had been noted in 1917, a precovery.

Career & Major Achievements

As of 8 October 2026, there are 6,445 confirmed exoplanets in 4,834 planetary systems, with 1,070 systems having more than one planet. There are many methods of detecting exoplanets. Transit photometry and Doppler spectroscopy have found the most, but these methods suffer from a clear observational bias favoring the detection of large planets close to the star.

Enduring Legacy & Impact

About 1 in 5 Sun-like stars are estimated to have an "Earth-sized" planet in the habitable zone. Assuming there are 200 billion stars in the Milky Way, it can be hypothesized that there are 11 billion potentially habitable Earth-sized planets in the Milky Way, rising to 40 billion if planets orbiting the numerous red dwarfs are included. The least massive exoplanet known is Draugr, which is about twice the mass of the Moon.

Chronological Milestones & Life Events

1. 1988: 1988 Milestone — A different planet, first detected in 1988, was confirmed in 2003.
2. 1992: 1992 Milestone — The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995.
3. 2016: 2016 Milestone — In 2016, it was recognized that the first possible evidence of an exoplanet had been noted in 1917, a precovery.
4. 2026: 2026 Milestone — As of 8 October 2026, there are 6,445 confirmed exoplanets in 4,834 planetary systems, with 1,070 systems having more than one planet.

Historical Fact-Check Quiz: Exoplanet

True or False: “It is a common misconception that all exoplanets must orbit a star similar to our Sun (G-type star).”

Answer (FALSE ❌): Exoplanets are found orbiting stars of many types, including red dwarfs (M-type) and even pulsars, demonstrating vast stellar diversity.

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• Alberto Sordi — Historical peer (Died in 2003) (2003): Pillar of Italian Cinema, master of Commedia all'italiana comedy.
• Alija Izetbegović — Historical peer (Died in 2003) (2003): Bosnian politician, Islamic philosopher, and author who led Bosnia through its tumultuous independence.
• Abbas Kiarostami — Historical peer (Died in 2016) (2016): Master Iranian filmmaker known for blending fiction and documentary styles.
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Frequently Asked Questions about Exoplanet