Would Earth’s growth change the composition of space?

The curious minds at What If investigate whether Earth could survive if Jupiter swallowed it whole, exploring the ...

The planet's radius from pole to center has been revised to 66,842 km, and at the equator to 71,488 km. That makes it about ...

But unlike Jupiter, Venus does have phases, going from not illuminated at all (when it is between the Earth and the Sun) to ...

Today marks the final day of the legislative session. Since the start of the 30-day session on Jan. 20, Earth, Wind and Fire ...

Six planets will line up in a rare "planetary parade" this month - but spotting them all won't be easy.

For decades, scientists believed they had a solid handle on Jupiter’s size and shape.

"We don’t know where they are,” said NASA’s planetary defense officer Kelly Fast at the AAAS conference in Arizona this week.

Updated measurements from NASA’s Juno spacecraft could help researchers better understand the planet's mysterious interior, ...

Six planets will briefly share the twilight sky this month - but the conditions have to be just right.