Super-sharp imaging confirms that the nearby red giant star L2 Puppis is forming a tiny bipolar nebula as it comes to the end of its life.
Amateur observers helped reveal a rare eclipse of a close stellar pair known as b Persei by a third companion star.
Two new studies confirm that the white dwarfs that explode as Type Ia supernovae can approach death in two different ways.
With the initial release of the USNO's Robotic Astrometric Catalog (URAT1), astronomers now have precise positions for about 228 million stars in the northern sky. Given my love of stone walls, I've been thinking about building one in the backyard to enclose the flower beds. But I haven't had the gumption to actually buy...
NASA’s NuSTAR mission has detected an unexpected haze of high-energy X-rays in our galaxy’s center, perhaps the signal of a mass stellar graveyard.
New evidence suggests that nanoflares, small but potent bursts of energy, might heat the Sun’s atmosphere. But not everybody’s convinced.
A 6th-magnitude nova erupted inside the Sagittarius Teapot and reached 4th magnitude. Now it has started fading.
A team of astronomers compared two images taken 18 years apart to catch the dramatic evolution of a forming star and its surroundings.
Astronomers have found two just-born star clusters an incredible 16,000 light-years above the plane of the Milky Way galaxy.
Astronomers have taken a behind-the-scenes look at a set of dense gas clumps, catching a quadruple star system in the fleeting act of formation.
Thanks to the help of the general public, astronomers have discovered a new signature marking a hidden phase of star formation.
When the massive, unstable southern star Eta Carinae sent a blast of X-rays into space last July, astronomers around the world were waiting and watching.
The Hubble Space Telescope is commemorating its 25th anniversary with a second look at the Pillars of Creation — but there’s hard science behind these pretty pictures.
Astronomers have expanded their ability to date stars using the stars’ own spins.
New IRIS results show a Sun rife with twisting and snapping magnetic fields, data that will elicit clues on what bakes the puzzlingly hot corona.
Two new studies suggest that ultraluminous X-ray sources are not all created by beefy black holes.
Astronomers might have an explanation for why some classical novae erupt in gamma rays.
A new measurement, made using radio interferometry, argues that the distance to the Pleiades star cluster measured by ESA's Hipparcos satellite really is wrong — and that ground-based astronomers had it right all along.
Astronomers might have found a star that was infected by the explosive death of one of the universe’s first stars.
Astronomers might be on the brink of developing a new rung on the cosmic distance ladder.
Astronomers have detected a star in pre-explosion images of the peculiar supernova 2012Z. The detection is the first discovery of a potential progenitor for the oddball class of stellar explosions dubbed Type Iax.
Astronomers have detected gamma-ray emission from three classical novae, an unexpected discovery that has left them perplexed.
NASA's Fermi Space Telescope recently spotted a pulsar in a rare transitional phase as it devours the matter of its companion star.
Scientists have confirmed that the soft X-ray glow permeating the sky has two sources: one inside the solar system, one outside.
A newly discovered radio burst places these ultrafast, ultrabright pulses on the cosmic map of unknown phenomena.