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

Jumping back in time, Thuban was positioned as a North Star some 4,700 years ago, as early civilizations thrived in ...

India's attempt to launch an Earth-observing radar satellite tonight (May 17) ended in failure.

Space Solar's successful "Cassidi" project marks a significant step towards delivering continuous, clean energy from space.

Skywatchers across nine northern U.S. states have a rare chance to witness a dazzling display of the aurora borealis this ...

Experts say the sight of satellites burning up on re-entry to the atmosphere will become more common as more man-made objects are launched.

In photos The details in this photograph include the airglow of the atmosphere dividing Earth from space — yellow-green at an ...

The Falcon 9 rocket sent up Starlink 12-15 mission from Space Launch Complex 40 at Cape Canaveral Space Force Station at ...

A little over 240 years ago, birds were the only things that could fly above the ground untethered without eventually falling ...

We've even been asked if you could run solar cells during the long lunar night on reflected earthlight, so we decided to ...