A study published in Science Advances sheds new light on the mysterious origins of free-floating planetary-mass objects (PMOs ...

A man claiming to have traveled to the future has ignited a storm of speculation online with his bold predictions for the ...

New evidence shows that, far beyond Pluto, there may exist a hypothetical planet referred to as Planet X or Planet Nine.

A stunning "parade of planets" will grace the night sky this week, with all seven of Earth's celestial neighbors joining the ...

Seven worlds align under one sky in a breathtaking photograph captured by astrophotographer Josh Dury. Astrophotographer Josh Dury captured this stunning photograph of the seven-planet alignment on ...

In world-first observations, the James Webb Space Telescope is watching two distant alien planets "spilling their guts into ...

Geochemical evidence from laboratory experiments for a potential solid inner core at the center of Mars is reported in Nature ...

An alignment of seven planets will appear, whether by the naked eye or with the use of a telescope, this month in the U.S. Here's how to spot it.

For example, Mercury, being closest to the sun, takes just 88 Earth days to complete one orbit. On the other hand, Neptune, ...

Mars, Venus, Jupiter, Mercury and Saturn should be visible to the naked eye. You'll need a high-powered viewing device like a ...