The equinox marks the arrival of fall in the Northern Hemisphere on Sept. 22. Are you ready for fall? The official arrival of fall is the autumnal equinox, which occurs in the Northern Hemisphere on ...

Stargazers in the U.S. will witness the razor-thin waning crescent moon rise close to Venus and the bright star Regulus in ...

Fall equinox 2025 arrives on Monday 22. Find out why the first day of autumn still features a little more daylight than ...

Watch the crescent moon, Venus and the bright star Regulus align in a rare predawn close conjunction tomorrow.

As of Thursday, Sept. 18, the moon phase is Waning Crescent, and it is 11% lit up to us on Earth, according to NASA's Daily ...

The moon had a fluctuating orbit around the Earth, but recent changes in distance could be caused by the tidal force shifting the planet’s mass.

Long ago, the Moon was much nearer Earth. Scientists believe a protoplanet collision created the Moon 4.5 billion years ago.

The Moon is getting 1½ inches (3.8 centimeters) farther away from the Earth every year. Scientists measure the distance to the Moon by bouncing lasers off mirrors placed there by space probes and ...

Today, Sept. 8, 2025, the moon is 16 days old and is in the Full Moon phase of its lunar cycle. It is 99% illuminated.

As Earth moves through space, it wobbles slightly. A team of researchers from the Technical University of Munich (TUM) and the University of Bonn has now succeeded in measuring these fluctuations in ...

The autumn night sky in Ireland is an observer's treasure-trove and the first celestial event of the season arrives on ...

A set of instruments shut off almost 50 years ago are still producing useful results. It's the seismometers left by the Apollo missions to monitor moonquakes, which, as the name suggests, are ...