News tagged with terrestrial planets

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Are super-Earths actually mini-Neptunes?

(Phys.org)—In the last two decades astronomers have found hundreds of planets in orbit around other stars. One type of these so-called 'exoplanets' is the super-Earths that are thought to have a high proportion ...

dateFeb 04, 2013 in Astronomy
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Alien earths could form earlier than expected

(Phys.org) -- Building a terrestrial planet requires raw materials that weren't available in the early history of the universe. The Big Bang filled space with hydrogen and helium. Chemical elements like silicon ...

dateJun 13, 2012 in Astronomy
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Image: The Milky Way's 100 billion planets

(Phys.org) -- This artist's illustration gives an impression of how common planets are around the stars in the Milky Way. The planets, their orbits and their host stars are all vastly magnified compared to ...

dateApr 26, 2012 in Astronomy
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Proposed Mars mission has new name

A proposed Discovery mission concept led by NASA's Jet Propulsion Laboratory, Pasadena, Calif., to investigate the formation and evolution of terrestrial planets by studying the deep interior of Mars now has ...

dateFeb 28, 2012 in Space Exploration
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