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The team released a paper of their findings dated 27 April 2007, published in the July 2007 journal Astronomy & Astrophysics. [1] At the time of discovery, it was reported to be the first potentially Earth-like planet in the habitable zone of its star [5] [6] and the smallest-known exoplanet around a main-sequence star, but on 21 April 2009, another planet orbiting Gliese 581, Gliese 581e ...
Gliese 581 (/ ˈ ɡ l iː z ə /) is a red dwarf star of spectral type M3V which hosts a planetary system, 20.5 light-years (6.3 parsecs) away from Earth in the constellation Libra. Its estimated mass is about a third of that of the Sun, and it is the 101st closest known star system to the Sun. [15] Gliese 581 is one of the oldest, least active ...
Dynamical simulations of the Gliese 581 system assuming that the orbits of the three planets are coplanar show that the system becomes unstable if the masses of the planets exceed 1.6–2 times the minimum values. Using earlier minimum mass values for Gliese 581d, this implies an upper mass limit for Gliese 581d of 13.8 Earth masses. [12]
Gliese 581b or Gl 581b is an exoplanet orbiting within the Gliese 581 system, located 20.5 light-years (6.3 parsecs) away from Earth in the Libra constellation. It is the first planet discovered of three confirmed in the system so far, and the second in order from the star.
Predicting anything on Gliese 581 c is simply impossible until we find a way to probe something about the object -reasonable hypothesis can be made, but I think in this case we should stick with known scientific literature, or we will really find ourselves into OR. --Cyclopia 12:42, 16 October 2008 (UTC)
Then there's "Gliese 581 c ... is notable as it is the planet with lowest minimum mass yet discovered in the habitable zone of another star, making it the most earthlike exoplanet found to date.[18]" compared to "Gliese 581 e, ... at an estimated minimum mass of 1.9 Earths, is currently the lowest mass exoplanet identified around a normal star".
Keira Knightley admitted in a new interview with the Los Angeles Times that she told “Love Actually” director Richard Curtis while filming the infamous cue card scene with Andrew Lincoln that ...
I have found a grand total of one reference to the date of discovery for this planet. That is April 4th, 2007, cited on a Princeton website. I changed the date in the article to c