Astronomers have taken a careful census of the smallest stars in our galaxy’s center.
Astronomers have spotted what appears to be a regular signal coming from the blazar PG 1553+113.
Here's a quick guide to the essential features that you should look for when buying your first telescope.
An ultra-deep survey has turned up a sizable object situated nearly 10 billion miles from the Sun — more distant than any known solar-system object.
High-mass stars may outshine and outweigh the Sun, but observations show all stars may have had a similar beginning.
This year's Leonid meteor shower, which peaks tonight, will offer modest numbers of "shooting stars" — but might reward you with some dazzling fireballs.
NASA's new remote observatory located on a windswept island in the mid-Atlantic provides a critical capability for tracking space junk.
Astronomers have caught a giant elliptical galaxy “shimmering” as its stars pulsate.
The Fermi Gamma-ray Space Telescope has discovered that almost all of the highest energy photons in the Large Magellanic Cloud come from two pulsars.
As ESA's comet orbiter enters its final year of operations, mission managers are deciding its fate.
Comet Catalina returns this month with naked-eye potential. Follow its every move with our guide and maps.
Four months after New Horizons' historic flyby, mission scientists have been amazed by unexpected discoveries — and by how some preconceptions about Pluto were flat-out wrong.
NASA’s Mars orbiter MAVEN has painted a detailed picture of how the solar wind robs the Red Planet of its atmosphere.
Big bits of Comet Encke are streaking into Earth's upper atmosphere and attracting attention around the world, as the Taurid fireball display of 2015 continues.
The presence of stars just 100 million years old in the Milky Way Galaxy’s central regions confirms our galaxy’s nonviolent past.
X-ray observations suggest that flares happen when a black hole's "atmosphere" contracts and launches away from it.
Astronomers have gathered enough observations to produce an exquisite image of another star’s surface.
Hubble observations confirm that much of the light that broke up the early universe’s hydrogen came from the smallest galaxies.
WT1190F will burn up over the Indian Ocean on November 13th, giving researchers an unprecedented opportunity to follow its path — and figure out where it came from.
If you see a really bright autumn fireball, it might be a Taurid meteor — a fragment of Comet 2P/Encke.
Astronomers can't decide whether the sizable object known as 2015 TB145, which is cruising past Earth today, is a renegade asteroid or a dead comet.
On October 28th, the Cassini spacecraft took its deepest dive through the water plume spewing from the south pole of Saturn’s moon Enceladus. It passed only 30 miles (50 kilometers) above the icy surface.
Bright planets are putting on a show in the predawn sky, and evenings feature a mythical horse flying upside-down across the sky.
New Horizons' principal investigator describes the most amazing discoveries made when NASA's New Horizons spacecraft flew past Pluto last July.
An innovative Earth-observing satellite now shows near-daily views of our home planet online.