They Discovered Another Earth

Gliese 581 C is the first planet discovered in the universe with water like earth. The super earth planet is named after its red dwarf sun star about 1/3 the size of the earth’s sun. Gliese 581 C is 5.6 times the earth with 50% water. Found in the Milkyway galaxy, in consellation Libra, this planet is the 87th one closest to the earth’s sun.
Life as we know it is now expanding. People now will be able to take a vacation on Gliese 581 C, or maybe even live there. Humans now have a way to maintain life outside of earth. Lets say there is an alien invasion, or what if the apocalypse begans. Would humans want to take a rocket uhaul to live on Gliese 581 C.
One thing we won’t have to worry about is food. With water present on the planet greenhouses will not be a necessity. People will actually have a chance at living there.
Life as we know it is now not an endangered species.


2 Replies to “They Discovered Another Earth”

  1. Gliese 581 c initially generated interest because it was originally reported to be the first potentially Earth-like planet in the habitable zone of its star, with a temperature right for liquid water on its surface, and by extension, potentially capable of supporting extremophile forms of Earth-like life.[2][5] However, further research on the potential effects of the planetary atmosphere casts doubt upon the habitability of Gliese 581 c and indicates that the fourth planet in the system, Gliese 581 g, is a better candidate for habitability.[1] In astronomical terms, the Gliese 581 system is relatively close to Earth, at 20.3 light years (192 trillion km or 119 trillion miles) in the direction of the constellation of Libra.[6][7] This distance, along with the declination and right ascension coordinates, give its exact location in our galaxy. It is identified as Gliese 581 by its number in the Gliese Catalogue of Nearby Stars; it is the 87th closest known star system to the Sun.
    Habitability and climate

    The study of Gliese 581 c by the von Bloh et al. team has been quoted as concluding “The super-Earth Gl 581c is clearly outside the habitable zone, since it is too close to the star.”[25] The study by Selsis et al. claims even “a planet in the habitable zone is not necessarily habitable” itself, and this planet “is outside what can be considered the conservative habitable zone” of the parent star, and further that if there was any water there then it was lost when the red dwarf was a strong X-ray and EUV emitter, it could have surface temperatures ranging from 700 K to 1000 K (430 to 730 °C), like Venus today.[26] Temperature speculations by other scientists were based on the temperature of (and heat from) the parent star Gliese 581 and have been calculated without factoring in the margin of error (96 °C/K) for the star’s temperature of 3432 K to 3528 K, which leads to a large irradiance range for the planet, even before eccentricity is considered.[27]
    Effective temperatures

    Using the measured stellar luminosity of Gliese 581 of 0.013 times that of our Sun, it is possible to calculate Gliese 581 c’s effective temperature a.k.a. black body temperature. (note: this probably differs from its surface temperature). According to Udry’s team, the effective temperature for Gliese 581 c, assuming an albedo (reflectivity) such as Venus’ (0.64), would be −3 °C (27 °F), and assuming an Earth-like albedo (0.296), then it would be 40 °C (104 °F),[6][9] a range of temperatures which overlaps with the range that water would be liquid at a pressure of 1 atmosphere. However, the effective temperature and actual surface temperature can be very different due to the greenhouse properties of the planetary atmosphere: for example, Venus has an effective temperature of 34.25 °C (307.40 K; 93.65 °F), but a surface temperature of 463.85 °C (737.00 K; 866.93 °F) (mainly due to a 96.5% carbon dioxide atmosphere), a difference of about 430 °C (770 °F).[28] Studies of the habitability (i.e. liquid water for extremophile forms of life)[29] conclude that Gliese 581 c is likely to suffer from a runaway greenhouse effect similar to that found on Venus, as such, is highly unlikely to be habitable. Nevertheless, this runaway greenhouse effect could be prevented by the presence of sufficient reflective cloud cover on the planet’s day side.[30] Alternatively, if the surface were covered in ice, it would have a high albedo (reflectivity), and thus could reflect enough of the incident sunlight back into space to render the planet too cold for habitability, although this situation is expected to be very unstable except for very high albedos greater than about 0.95 (i.e. ice): release of carbon dioxide by volcanic activity or of water vapor due to heating at the substellar point would trigger a runaway greenhouse effect.[31]
    Liquid water

    Gliese 581 c is likely to lie outside the habitable zone.[25][32] No direct evidence has been found for water to be present, and it is probably not present in the liquid state. Techniques like the one used to measure the extrasolar planet HD 209458 b may in the future be used to determine the presence of water in the form of vapor in the planet’s atmosphere, but only in the rare case of a planet with an orbit aligned so as to transit its star, which Gliese 581 c is not known to do.

  2. The fact is that there are exact replicas of earth. But we haven’t found it yet. How do I say this?/ There are more number of stars in the universe then more number of grains of sand on earth. This rises the fact of exact replica of earth a high probability. But we don’t have the understanding or technology to find them yet. Dont worry we will surely find them one day 🙂

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