Look to the eastern sky late Thursday, and a clear horizon will show you this unusual, grinning planet alignment.

"Before Hubble, no generation ever had access to unimaginably vibrant views of space, stretching almost all the way back to ...

Space exploration missions have revealed that polar vortices aren’t uncommon beyond Earth. They’ve been observed throughout ...

Best viewed from the Northern Hemisphere, the Lyrid meteor shower is the world's oldest known of its kind and reliably occurs ...

Webb has two decades ahead of it, but it's already captured some stunning images. Here are 35 of our favorites.

April's Lyrid meteor shower peaks tonight. Here is when and how to watch the exciting 'fireball show' across the night sky ...

In groundbreaking photos, eclipse chasers captured the elusive solar corona during a partially eclipsed sunrise/moonrise in Quebec. It could change eclipse chasing forever.

The next supermoon is expected to reach its closest distance to Earth along its orbit. But even without clouds in the sky, it ...

The upcoming Lyrid meteor shower in April is the next major show of the year. It has been active since April 15, but the ...

Lyrid's peak is forecast to last for two nights beginning Monday, with bright fireballs visible from the West Coast. Here's what to know.