Credit & Copyright: Digitized Sky SurveyExplanation: Centered in this unremarkable, 1/4 degree wide patch of sky in the constellation Aquarius is the star Gliese 876. Gliese 876 is smaller than the Sun, only about 1/3 as massive, and too faint to be seen without a telescope. But it is known to be one of the nearest stars, only 15 light-years distant. Astronomers have just announced findings that imply Gliese 876 has a planet at least 1.6 times as massive as Jupiter - making this now one of the closest suspected planetary systems. Like many recent discoveries, this planet's detection is not based on direct imaging but on spectroscopic measurements of the periodic change in motion or "Doppler wobble" produced in the parent star as the planet orbits. The Doppler wobble of Gliese 876 indicates that its planet orbits once every 61 days at an average distance of about 1/5 the radius of the Earth's orbit.
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& Michigan Tech. U.
Based on Astronomy Picture Of the Day
Publications with keywords: extrasolar planet - Gliese 876
Publications with words: extrasolar planet - Gliese 876
- APOD: 2020 August 18 Á TYC 8998 760 1: Multiple Planets around a Sun Like Star
- The Kepler 90 Planetary System
- NGST 10b: Discovery of a Doomed Planet
- Goldilocks Zones and Stars
- Water Vapor Discovered on Distant Exoplanet
- Artistic Impression: The Surface of TRAPPIST 1f
- Four Planets Orbiting Star HR 8799