News tagged with rocky planet

Jupiter twin discovered around solar twin

Astronomers have used the ESO 3.6-metre telescope to identify a planet just like Jupiter orbiting at the same distance from a Sun-like star, HIP 11915. According to current theories, the formation of Jupiter-mass planets ...

dateJul 15, 2015 in Astronomy
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Measuring the mass of a Mars-size exoplanet

Determining the size of an Earth-size exoplanet by the amount of starlight it blocks hundreds of light-years away once was the realm of science fiction. Measuring the mass of such a small planet based on its gravity was ...

dateJun 18, 2015 in Astronomy
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Jupiter's movements made way for Earth

There's something about our solar system that appears to be unusual. For some reason, most of our bigger planets are far away from our host star, while closer in are smaller, rocky worlds, including Earth itself.

dateJun 23, 2015 in Astronomy
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Wandering Jupiter accounts for our unusual solar system

Long before Mercury, Venus, Earth, and Mars formed, it seems that the inner solar system may have harbored a number of super-Earths—planets larger than Earth but smaller than Neptune. If so, those planets are long gone—broken ...

dateMar 23, 2015 in Astronomy
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