WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its gaseous ...

An exoplanetary system about 116 light-years from Earth could flip the script on how planets form, according to researchers who discovered it using telescopes from NASA and the European Space Agency, ...

Astronomers have discovered what appears to be an exoplanet that could be a distant Earthly paradise. Or it could be a frigid realm even chillier than Mars, incapable of supporting life. The margins ...

There’s a celestial connection on the horizon. Six planets—Jupiter, Mercury, Neptune, Saturn, Uranus, and Venus—are set to appear in the sky in what’s known as a planet parade on Feb. 28. And since ...

Planets are always lined up along the same celestial path, so this “parade” is all about timing Six planets will appear along the same stretch of sky just after this weekend, with the best views ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A planet parade — mistakenly called a planetary alignment by ...

The updated measurements won't take away Jupiter's status as the solar system's biggest planet. NASA / JPL-Caltech / SwRI / MSSS Scientists may have been overestimating the size of the solar system’s ...

The current image of Mars as an arid and hostile desert contrasts sharply with the history revealed by its surface. Channels, minerals altered by water, and other geological traces indicate that the ...

Astronomers have produced the most detailed map yet of dark matter, revealing the invisible framework that shaped the Universe long before stars and galaxies formed. Using powerful new observations ...

Mercury, Venus, Neptune, Saturn, Uranus and Jupiter will appear together shortly after sunset on Feb. 28 — but is this the "planet parade" we've been waiting for? When you purchase through links on ...

Artist’s concept of exoplanet candidate HD 137010 b, dubbed a “cold Earth” because it’s a possible rocky planet slightly larger than Earth, orbiting a Sun-like star about 146 light-years away. Credit: ...