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

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

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

American space agency NASA announced the discovery of a planetary system that isn't flat, has transit timing variations, and shows orbital planes tilting ...

The Sun, our life-giving star, is slowly dying. In about 5 billion years, it will exhaust its fuel and transform into a red giant, altering the solar system forever. But long before that, the Sun’s ...

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...

Mount Everest may be the tallest mountain on Earth, but it's nothing compared to the towering giants scattered across our ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

I/ATLAS is only the third interstellar object ever detected. You can stream the object live today, or maybe see it from your ...

Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...

Researchers from the Nanjing Institute of Geology and Paleontology of the Chinese Academy of Sciences and Columbia University ...

NASA telescopes in Chile have discovered a comet from interstellar space, making its closest approach in October.