Saturn will put on a show for professional and backyard astromers alike, and be the brightest and closest it has been to Earth all year. On Sunday, Sept. 21, Saturn will be at opposition, meaning the ...

Summer is officially over September 22, at 2:19 p.m. Time to hang up the surfboard, deflate the beach balls, stow the grill, ...

A partial solar eclipse happens Sunday in parts of the Southern Hemisphere. Saturn will also appear at its brightest, with ...

The sun is in its most active phase—solar summer—causing auroras and posing real risks to satellites, GPS, and power systems ...

This has been calculated by those American researchers who spend all day staring at the stars and the Moon. They use laser ...

The autumnal equinox arrives Monday, marking the start of the fall season for the Northern Hemisphere and the spring in the ...

The Earth stands alone in the solar system as a habitable world, as far as we know. But that doesn’t mean we don’t get visitors, most often in the form of (usually harmless) asteroids. Some even ...

September will have a trio celestial conjunction. Here's how to see the moon and Venus together in Arizona and upcoming alignments.

The sun has become increasingly active since 2008, a new NASA study shows. Solar activity is known to fluctuate in cycles of ...

Three celestial bodies are preparing to meet up for one night in September in a cosmic conjunction that should be widely ...

So the bottom line is that the gravity of the closer tidal bulge on the Earth is pulling the Moon forward, which increases ...

Saturn will make a particularly brilliant appearance amongst the stars this weekend, according to the Royal Observatory’s night sky highlights for September. It will appear so brightly, that the ...