An aperture mask is a simple device for easier observing that increases the effective focal ratio of a telescope.

Arp 184’s single broad arm hints at a unique past, earning it a place in a famous catalog of peculiar galaxies.

Two occurrences of the world’s greatest science festival took place last month — one in La Palma, Canary Islands, and one in ...

NASA’s Chandra X-Ray Observatory helped diagnose the cause behind a large kink in a huge filament near the center of the ...

An astronomer breaks down 3 key components that allow researchers to make groundbreaking discoveries — and decide when ...

Skinny” funding prioritizes a focus on Moon and Mars missions over science and projects characterized as “grossly expensive.” ...

This morning is the best time to catch the Eta Aquariid meteor shower, which should produce about 10 meteors per hour before dawn.