Noctilucent clouds usually form close to the poles, but in recent decades, they’re being spotted closer to the Equator ...

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

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

The best time to see noctilucent clouds is on clear nights between late May and mid-August, about 90 to 120 minutes after ...

An ominous green sky is often associated with severe weather, but not every storm causes the sky to change colors.

We will see some isolated rain chances for our Saturday as we wrap up May. We start mainly cool with conditions in the upper ...

The fleeting glow of noctilucent clouds is once again making its appearance in Earth’s upper atmosphere, signaling the start ...

NASA's Mars Exploration Rover Spirit captured this stunning view as the sun sank below the rim of Gusev crater on Mars.

Earth’s sister planet reaches greatest western elongation and dichotomy as the waxing Moon slides along the ecliptic in the ...

We will see some isolated rain chances for our Saturday as we wrap up May. We start mainly cool with conditions in the upper ...

Explore the wonders of the Northern Hemisphere's night sky with our guide to the best celestial sights you can observe with binoculars between May and July.