The sky's no limit when you're flying high ... Today is "Hot Air Balloon Day," and there are some daring stars addicted to ...

We’ll kick off this week with a beautiful sunset in Waddington, looking toward Canada. Joy Hazen is sending in today’s photo ...

This month's night sky is filled with close-range meteors, swirling nebulas, and prime stargazing conditions. Here’s when you ...

Auroras over the Merimbula Lake in New South Wales, Australia. Image: X/@The_Feefenator. Auroras captured over Silsand in ...

Countless shadowed craters line the terminator all the way down to the moon's southern pole, while the 54-mile-wide (87 km) ...

New data show a 50% chance the Milky Way won't collide with Andromeda. A merger with the Large Magellanic Cloud is far more ...

Noctilucent clouds, Earth's highest clouds, shine blue in the twilight sky from late May to August in the northern hemisphere ...