The mysterious Oort cloud is the source of many of our solar system's comets, but astronomers still have no idea what it ...

NASA's Pioneer 11 spacecraft left the solar system! This was the second spacecraft to travel beyond the planetary part of our ...

A shell of icy objects at the edge of the solar system known as the Oort cloud has a pair of spiral arms that resemble a miniature galaxy, new research suggests.

Planet ‘parades’ are not uncommon. While occasionally spotting 4-5 planets is not unusual, sighting the alignment of all 7 ...

The view was acquired on Sept. 14, 2017 at 19:59 UTC (spacecraft event time). The view was taken in visible light using the ...

Witness a rare celestial spectacle as all seven planets in our solar system align next week—an event that won't repeat until ...

They expect sodium carbonate and halite will be found in surface deposits on Ceres, in water plumes from Saturn's satellite ...

Saturn’s rings are an arresting sight even through modest telescopes. The planet is made mostly of hydrogen and helium whereas the rings are billions of pieces of mostly bright-white water ice and ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Ahead of its dance with Saturn on Feb. 24, Mercury should be seen on Feb. 19 at magnitude -1.2 with binoculars 20 minutes ...

By Alimat Aliyeva Japanese scientists from Kyoto University have discovered evidence of salt minerals on the asteroid R ...