On July 6, 1938, an American astronomer named Seth Barnes Nicholson discovered Jupiter's moon Lysithea. Nicholson spotted Lysithea from Mount Wilson Observatory in California, where he had previously ...

NASA launched New Horizons to explore Pluto. In 2019, it visited the furthest object in the Solar System we have seen up ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

"It is incredible that modern telescopic surveys have the ability to detect such small objects up to millions of kilometers ...

On July 20, for viewers in the US and Canada, the waning crescent Moon will pass in front of the Pleiades, eclipsing them ...

Summer nights offer lots of interesting sights this month. Mercury and Mars are on show in the evening twilight. Both Uranus and Neptune stand near brighter beacons: Neptune and Saturn are two ...

Sedna, a distant dwarf planet three-quarters the size of Pluto, is inching toward the brightest star in our sky — and in 2076 ...

Earth may briefly capture as many as six moon fragments — called minimoons — at any given time before they move on to orbit ...

We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

Neptune is called an “ice giant” because it’s mostly made of a thick, slushy mix of water, methane, and ammonia, which ...

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New research suggests that at any given time, Earth may temporarily capture up to half a dozen fragments from the moon, known ...