Minute and Second of Arc

The Lucy spacecraft is heading to Jupiter's Trojan asteroids. But first it will rendezvous with the main-belt asteroid Donaldjohanson on April 20. The post Lucy spacecraft to fly by asteroid Donaldjohanson today. Expect surprises first appeared on EarthSky.

SGR 0501+4516 is the likeliest candidate in our Milky Way Galaxy for a magnetar that was not born in a supernova explosion as initially predicted; the object is so strange it might even offer clues to the mechanism behind fast radio bursts.

The Lyrids and Eta Aquarids meteor showers can both be seen starting in late April, with viewing opportunities in both the northern and southern hemispheres

NASA's Lucy spacecraft is 6 days and less than 50 million miles (80 million km) away from its second close encounter with an asteroid; this time, the small

A new way to measure the length of Uranus's day could also help determine the rotation rates of other celestial objects—including exoplanets

New study suggests it likely doesn't have air.

We're coming for you, near-Earth objects.

The Atomic Spectroscopy Group provides standardized measurements used across wide swaths of science and industry. The Trump administration plans to cut it.

Everything you need to know about the full moons of 2025.

But nothing is certain, yet.

Depending on your locale, equinoxes can be seen as harbingers of longer nights and gloomy weather, or promising beacons of nicer temperatures and more

The Worm "Blood" Moon brings a total lunar eclipse to skies over the Philadelphia region on March 14, 2025. Here's the best times to see totality's red hue.

The SPHEREx telescope will create the most colorful map of the cosmos, while the four satellites of the PUNCH mission track the evolution of the solar wind in three dimensions.

SIMP 0136 shows just how complex our universe really is.

The planet parade afterparty rages on, particularly for Mercury and Venus.

And it could get explosive.

On Friday night, NASA will launch its latest space telescope: SPHEREx, designed to study how the universe developed in the first seconds after the big bang.

The Unistellar Odyssey Pro makes astronomy and astrophotography incredibly easy, provided you are willing to pay for convenience.

NASA has selected SpaceX of Starbase, Texas, to provide launch services for the Near-Earth Object (NEO) Surveyor mission, which will detect and observe

The accretion disk orbiting Sagittarius A* is emitting a constant stream of flares with no periods of rest, according to an analysis of new data from the NASA/ESA/CSA James Webb Space Telescope.