News tagged with inner planet

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
shares515 comments 0

Mercury sole survivor of close orbiting planets

The vast quantity of planets and planetary candidates identified by NASA's Kepler spacecraft has revealed an array of systems. Some have Jupiter-sized planets close to the Sun, while others show only a handful of planets. ...

dateJun 08, 2015 in Astronomy
shares81 comments 7

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
shares2132 comments 19

Do missing Jupiters mean massive comet belts?

(Phys.org)—Using ESA's Herschel space observatory, astronomers have discovered vast comet belts surrounding two nearby planetary systems known to host only Earth-to-Neptune-mass worlds. The comet reservoirs could have delivered ...

dateNov 27, 2012 in Astronomy
shares0 comments 1