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

Our Solar System is home to eight extraordinary planets, each with its own unique features, mysteries, and beauty. This cosmic journey takes you from the Sun-scorched surface of Mercury to the icy ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system. The object—which orbits out beyond Neptune—has been named "2017 OF201" by the ...

Jupiter is already the biggest planet by far in our solar system, but new research suggests it was somehow once even larger than it is now. Twice as large, in fact. To put that into context, those ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

Jupiter is our solar system's biggest planet by far. It used to be twice as large: Study A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow ...

A fascinating glimpse into how a solar system like our own is born has been revealed with the detection of planet-forming ...

I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the ...

The Kuiper Belt, a region of the solar system past Neptune’s orbit, is likely home to hundreds of thousands — if not millions — of icy objects that vary in shape and size.Over 2,000 trans-Neptunian ...

If its size is confirmed, it would be the second-biggest trans-Neptunian object. Only Pluto would be larger. ... 2017 OF201's size challenges ideas about a ninth planet in our solar system.

Our solar system may have a ninth planet after all, ... The hidden candidate is likely the size of Neptune and is so far away that it could take between 10,000 and 20,000 years to orbit the ...

Jupiter is already the biggest planet by far in our solar system, but new research suggests it was somehow once even larger than it is now.. Twice as large, in fact. To put that into context ...