Astronomers model changes in Earth’s chemical signature over the past 4 billion years to improve the search for Earth-like exoplanets.
exoplanets
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Dust from Colliding Asteroids Masqueraded as a Planet
New analysis of Hubble Space Telescope images suggests that Fomalhaut b, once believed to be an extrasolar planet, is, in fact, a cloud of dust that likely formed from the collision of enormous asteroids.
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Record-Setting Winds on a Nearby Brown Dwarf
Infrared and radio observations reveal zonal winds moving faster than 2,000 kilometers per hour on a “failed star” in our celestial neighborhood.
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Earth’s Skies Transmitted Signs of Life During Lunar Eclipse
Using upcoming ground- and space-based telescopes, scientists hope to make similar observations of the skies of distant, Earth-like exoplanets.
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Hot White Dwarfs May Reveal Cold Gas Giants
The gaseous atmospheres of giant planets may evaporate and accrete onto the dense surfaces of white dwarfs, providing astronomers a new way to detect hidden exoplanets.
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An Exoplanet with Evolving Clouds of Salts
Clouds form and dissipate on a gas giant orbiting a Sun-like star.
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Set to Music, Exoplanets Reveal Insights on Their Formation
Sonification hints at how some Kepler planets may have been configured in the late stages of their development.
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Water Found in Small, Habitable Zone Planet’s Atmosphere
K2-18b is warm, has an atmosphere, and has water vapor. But it’s no Earth 2.0.
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Nearest Star System May Have a Second Planet
The exoplanet candidate, tentatively named Proxima c, would be a frozen snowball.
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Ultrahot Exoplanet Bleeds Heavy Metals into Space
The planet is also shaped like a football (the American kind).