We know literally nothing about either planet except their orbital periods and minimum masses. Really all there is to be said is that they both orbit the same star.
3-6. The 3 planet model would have gliese 581 b too hot, gliese 581 c in the habitable zone, and gliese 581 d too cold. The 6 planet model would have gliese 581 e, b, and c too hot, gliese 581 g and d in the habitable zone, and gliese 581 f too cold.
A misspelling of Gliese 581 e perhaps?
21st April 2009 - Gliese 581 e is only 1.9 times the size of Earth [See related link]
Gliese 581 e is a planet with a mass similar to Earth and within the "habitable zone". See related links for more information
As of now, the exoplanet Proxima Centauri b, located in the habitable zone of its star Proxima Centauri, has one of the highest probabilities of supporting life among known exoplanets. It is a rocky planet similar in size to Earth, and its location within the habitable zone makes it a potential candidate for hosting liquid water, a key ingredient for life as we know it.
Gliese 581 is a red dwarf star that is around 20.5 light years from ours. Up to six planets have been detected in orbit around this star Gliese e, b, c, g, d and f. The fourth one out (Gliese 581 g) is thought to be the most Earth-like planet found so far, if it were to be a rocky planet. It is the right distance from its star in terms of ideal temperature (for liquid water). It is 3.1 to 4.3 times more massive than the earth. It was discovered in September 2010, but is still to be confirmed. It is possible that this planet may harbour life, but the exact surface conditions cannot be confirmed precisely enough to say for sure.
At present there are 350 extrasolar planets. Most are contained in the Milky Way galaxy. They are primarily "gas giant" planets, but if our solar system is typical (the Law of Mediocrity would lead us to believe it is) there should be many more rocky planets like ours.The extrasolar planets discovered in our neighbouring galaxy, Andromeda, are: * Upsilon Andromeda b (AKA: HD69830 b)* Upsilon Andromeda c (AKA: HD69830 c) * Upsilon Andromeda d (AKA: HD69830 d) * HD 8673 bAgain, if our galaxy is normal, then Andromeda would have planets around 10% of it's sun-like (G type) starsAside: The "Law of Mediocrity" states that you're nothing special. If you can do it, likely a lot of people can.Update 2009: Newest extra solar planets are Gliese 581 (the closest in size to Earth, only 1.9 times larger) and Gliese 581 (even larger), but it's sitting square in the habitable zone, where liquid water would be possible. Both Gliese 581 d and Gliese 581 e are located in constellation Libra and orbit around Gliese 581.
Unfortunately not. Gliese 581 has an apparent magnitude [See Link] of 10.57. The faintest object the naked eye can see, has an apparent magnitude of 6.5 (in perfect conditions). Even with binoculars, the faintest object is 9.5. The larger the apparent magnitude, the dimmer the object is. Our Sun has an apparent magnitude of -26.73 (yes minus)
The 4 brightest stars are: α Librae, Zubenelgenubi ("southern claw"), a visual binary; β Librae, Zubeneschamali ("northern claw"); γ Librae, Zubenelakrab ("scorpion's claw"); σ Librae, Brachium, an eclipsing variable. The ones that have bayer designations are: α (Zubenelgenubi) • β (Zubeneschamali) • γ (Zuben Elakrab) • δ (Zuben Elakribi) • ε • ζ¹ • ζ³ • ζ4 • η • θ • ι¹ • ι² • κ • λ • μ • ν • ξ¹ • ξ² • ο • σ (Brachium, γ Sco) • τ • υ The stars with flamsteed numbers are: (e.g. 51 Pegasi, but without the Pegasi) 2 • 3 • 4 • 5 • 7 (μ) • 8 (α¹, Zubenelgenubi) • 9 (α², Zubenelgenubi) • 10 • 11 • 12 • 13 (ξ¹) • 15 (ξ²) • 16 • 17 • 18 • 19 (δ, Zuben Elakribi) • 20 (σ, Brachium) • 21 (ν) • 22 • 23 • 24 (ι¹) • 25 (ι²) • 26 • 27 (β, Zubeneschamali) • 28 • 29 (ο) • 30 • 31 (ε) • 32 (ζ¹) • 33 • 34 (ζ³) • 35 (ζ4) • 36 • 37 • 38 (γ, Zuben Elakrab) • 39 (υ) • 40 (τ) • 41 • 42 • 43 (κ) • 44 (η) • 45 (λ) • 46 (θ) • 47 • 48 • 49 • 50 Nearby stars are: 33 G. (Gliese 570) • HN (Gliese 555) • HO (Gliese 581) • 2MASS 1507-1627 • Gliese 595 Libra is known to have 5 stars within 10 parsecs (32.62 lightyears). Libra Statistics: Abbreviation: Lib Genitive: Librae Pronunciation: /ˈliːbrə/, genitive /ˈliːbraɪ/ Symbolism: the balance Right ascension: 15 h Declination: −15° Quadrant: SQ3 Area: 538 sq. deg. (29th) Main stars: 4, 6 Bayer/Flamsteed stars: 46 Stars with planets: 3 Stars brighter than 3.00m: 2 Stars within 10.00 PC (32.62 ly): 5 Brightest star: Zubeneschamali (β Lib) (2.61m) Nearest star: Gliese 570 (19.20 ly, 5.89 PC) Messier objects: 0 Meteor showers: May Librids Bordering constellations: Serpens Caput Virgo Hydra Centaurus (corner) Lupus Scorpius Ophiuchus Libra is home to the star Gliese 581, which has a planetary system consisting of at least 6 planets, including Gliese 581 g, the best candidate planet for human habitability and extra-solar life yet discovered, Gliese 581 c, the first Earth-like extrasolar planet to be found within its parent star's habitable zone, Gliese 581 d, discovered in 2007 to be another Earth-like planet, and Gliese 581 e, the smallest mass exoplanet orbiting a normal star, all of which are of significance for establishing the likelihood of life outside of the Solar System. The family of candidate habitable planets was extended in late September 2010 to include Gliese 581 g, a tidally locked planet in the middle of the habitable zone, and currently the most likely discovered exoplanet to be capable of supporting life.
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Yes there is, its name is Gleise 581 e. Description:>>>A distant world known as Gliese 581e (foreground in this artist's conception) is the lightest planet outside our solar system found to date, astronomers announced in April 2009. The planet, one of four orbiting a red dwarf star, is just less than twice the mass of Earth. Astronomers also announced that one of the system's other planets, Gliese 581d, is an Earthlike world that orbits in the right zone to host liquid water, and thus potentially life
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