Earliest sightings of a young crescent in the west after sunset mark the start of the Islamic holy month of Ramadan. When will the UAE's moon-sighting committee see this month's young moon? If they're using binoculars and telescopes (and have clear skies), they might see it May 5. For the eye alone, the date is probably May 6.

The moon is sweeping past the planets Venus and Mercury in the morning sky now.

STEVE is a majestic sky phenomenon, similar to well-known auroras, but not as well understood. Now, a new study provides an explanation.

It was a flash of light seen on the edge of moon during the total lunar eclipse of January 20-21, 2019. Now astronomers have analyzed this meteor strike, the first ever filmed during an eclipse.

A University of Chicago physicist has laid out an innovative method - using the Higgs boson - for stalking dark matter. He said the Higgs might actually be "a portal to the dark world."

Maureen Allen captured the Milky Way and Jupiter over Lake Rousseau in Dunnellon, Florida, early in the morning of April 28, 2019.

Astronomers are meeting today at the Planetary Defense Conference to discuss plans to observe asteroid 99942 Apophis, a relatively large asteroid that'll sweep past Earth safely - but rather closely - in 2029.

"We were gobsmacked by what we saw in this system. It was completely unexpected ... It tells us a little more about that big question: ‘How did we get here?'"

The 1st-ever photo of a giant black hole made headlines earlier this month. Now see some beautiful images of M87, the great galaxy that it calls home, located some 55 million light-years from Earth.

The far side of the moon sees its share of sunlight. With all due respect to Pink Floyd, the moon's far side is dark only in the sense that it's mysterious. Here's why.