description 70 Virginis Overview
70 Virginis is a G-type main-sequence star located approximately 59 light-years from Earth in the constellation of Virgo. It is notable for hosting one of the earliest confirmed exoplanets, 70 Virginis b, which was discovered in 1996. The planet is a gas giant several times the mass of Jupiter orbiting the star in an eccentric path. This early discovery helped establish that giant planets could orbit sun-like stars in elliptical orbits.
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Why was the discovery of 70 Virginis b important?
Announced in 1996, 70 Virginis b was among the earliest exoplanets found around a Sun-like star. Its discovery helped demonstrate that massive planets can occupy eccentric orbits unlike those of the Solar System's giant planets.
Is 70 Virginis b a hot Jupiter?
It is a massive gas giant, but its orbit is much wider than the extremely tight orbits usually associated with hot Jupiters. It takes roughly four months to circle 70 Virginis and follows a notably eccentric path.
Could 70 Virginis b support life?
The planet is a gas giant several times more massive than Jupiter, so it is not considered an Earth-like surface habitat. Early speculation about its temperature did not establish that it was habitable.
How was 70 Virginis b detected?
Geoffrey Marcy and R. Paul Butler detected it through the radial-velocity method. This technique measures the recurring motion of 70 Virginis caused by the planet's gravitational pull.
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