Nuclear power startup Antares announced a $96 million Series B round Dec. 2 to fund work on developing small nuclear reactors ...

Samples collected from the asteroid Bennu are continuing the shed light on the origins of the solar system and how life ...

Earth’s orbit is getting crowded with broken satellites and leftover rocket parts. Researchers say the solution is to build ...

"I'm becoming much more optimistic that we may be able to find life beyond Earth, even in our own solar system." ...

Critics argue the satellites, billed as a way to harness solar energy at night, could hamper sky observations and may pose a ...

An exponential increase in the number of satellites placed in low-Earth orbit has brought advances in telecommunications ...

A new celestial discovery has astronomers buzzing: a small space rock, quietly trailing Earth for decades, has been confirmed ...

I nterstellar comet 3I/ATLAS will make its closest approach to Earth this month, whizzing by at 270 million kilometers (168 million miles) away, putting on a show for anyone equipped even with a small ...

"A three-body problem is extremely complicated. Now we're dealing with four: the sun, Earth, the moon and Mars. The heavy ...

Proliferating satellites are beginning to harm the science work of the beloved Hubble Space Telescope and other observatories ...

Later in December, the 3I/ATLAS interstellar comet will get as close to Earth as it ever will. Here's what to know.

Why does space look dark if the universe is full of stars? This was the question asked by Heinrich Wilhelm Olbers in 1823.