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Tag: largest

  • Meet the largest “mirror” in the Universe! 🪞✨ #shorts

    Meet the largest “mirror” in the Universe! 🪞✨ #shorts

    The fraction of light that an object reflects is called its ‘albedo’. Most planets have a low albedo, either because they have an atmosphere that absorbs a lot of light, or because their surface is dark or rough. Earth, for example, only reflects around 30% of incoming sunlight. Exceptions tend to be frozen ice-worlds, or planets like Venus which have a cloud layer (reflecting 75% of the Sun’s light in Venus’ case).

    LTT9779 b’s 80% of albedo came as a surprise because the planet’s side facing its star is estimated to be around 2000 °C. Any temperature above 100 °C is too hot for clouds of water to form, but the temperature of this planet’s atmosphere should even be too hot for clouds made of metal or glass.

    LTT9779 b can form metallic clouds despite being so hot because the atmosphere is oversaturated with silicate and metal vapours.

    📹 ESA – European Space Agency
    🖥️ Ricardo Ramírez Reyes/Universidad de Chile

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  • NASA’s Spitzer Reveals Largest Batch of Earth-Size, Habitable-Zone Planets Around a Single Star

    NASA’s Spitzer Reveals Largest Batch of Earth-Size, Habitable-Zone Planets Around a Single Star

    NASA held a news conference Feb. 22 at the agency’s headquarters to discuss the finding by the Spitzer Space Telescope of seven Earth-sized planets around a tiny, nearby, ultra-cool dwarf star. Three of these planets are in the habitable zone, the region around the star in which liquid water is most likely to thrive on a rocky planet. This is the first time so many planets have been found in a single star’s habitable zone, and the first time so many Earth-sized planets have been found around the same star. The finding of this planetary system, called TRAPPIST-1, is the best target yet for studying the atmospheres of potentially habitable, Earth-sized worlds

  • World’s Largest Aviation Prize Awarded on This Week@NASA

    World’s Largest Aviation Prize Awarded on This Week@NASA

    NASA has awarded the first place prize of $1.3M to Team Pipistrel in its Green Flight Challenge. Both Pipistrel, and second-place eGenius, flew all-electric aircraft at more than 375 miles on the equivalent of one gallon of fuel. Also, ISS Preps, Nobel Prize; Earth and comet water; ozone depletion; SpaceFarm7, and more.