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 ...

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

Rain and clouds may block Wednesday's viewing, if so, check back on Thursday to see if sunset stretches through the city grid of New York. If the weather doesn't cooperate, the alignment will again ...

A crescent moon will appear alongside the bright stars Castor and Pollox to form a lopsided grin in the night sky on May 29.

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

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

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.

Sunshine takes over for Memorial Day! After shaking off an unseasonably chilly morning, temperatures will reach the lower 70s ...

Planetarium and Program Coordinator Katy Downing of the Lake Erie Nature & Science Center shares the visible planets and ...