When was Pluto discovered? Pluto was discovered in 1930 by Clyde Tombaugh, an American astronomer at the Lowell Observatory ...

The Qatar Calendar House announced that Venus, the brightest planet in our solar system, will reach its closest point to the ...

"We were very surprised to see that the same tiny plasma jets appear to be driving both the fast and the slow solar wind." ...

Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may not be the full picture.

Pluto may not be a planet any more, but you still have a chance to see the distant dwarf planet at one of Michigan's ...

"With an orbital period of 570 days, it is a relatively cold gas giant planet," said Guðmundur Stefánsson of the University ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

On Feb. 11, the sun will meet with disruptive Uranus, triggering unexpected shake-ups and upheaval that no one saw coming.