New observations suggest this unstable star let off some steam before its famous 19th century “Great Eruption” . . . but there’s more to the story than meets the eye.
The European Space Agency's Gaia mission has released its first data release, mapping a billion stars across the Milky Way and beyond
Amateur astronomers worked together with the pros in the discovery of the pulsing white dwarf in the variable system known as AR Scorpii. Hear from Josch Hambsch, one of the amateurs on the team, on what it was like to take part.
A new study on KIC 8462852, the star of alien megastructure fame, finds yearlong trends that effectively rule out the one working theory astronomers had to explain this strange star.
A new Hubble Space Telescope image shows the very heart of the Crab Nebula, one of the most studied supernova remnants.
The Kavli Foundation hosted a Q&A with three astronomers to probe the recent discovery of hard-to-produce heavy elements in a nearby dwarf galaxy. The discovery sheds light on stellar histories and galactic evolution.
In 2015 ASASSN-15lh gained fame as the most luminous supernova ever discovered. Almost a year later and against all odds, the supernova has rebrightened.
Light’s finite speed helped astronomers pinpoint the location of the “inner wall” of the disk of dust and gas that’s feeding a fast-growing baby star.
Roughly 2 million years ago, as the human ancestor homo erectus was descending from the trees, two supernovae exploded nearby and showered Earth with debris.
Hidden within the subtle hues of the stars are the keys to their temperatures and compositions. Get acquainted with the classic OBAFGKM spectral sequence through real stars you can see on a spring night.
A brief burst of radio waves has been observed repeating, enabling astronomers to settle its exotic origin.
A radio burst with the energy of a hundred million Suns has finally been placed on the cosmic map, enabling scientists to investigate the origin of these mysterious bursts.
A multi-year investigation revealed errors in our understanding of the Sun.
New images of four circumstellar disks suggest that the star formation process is much more violent than previously thought.
Astronomers have confirmed that strong magnetic fields are frozen in place deep inside aging stars called red giants.
The most luminous supernova ever discovered, ASASSN-15lh, challenges a popular theory for blazingly bright exploding stars.
Astronomers looking for clones of a massive and famously unstable star in the Southern Hemisphere sky have found five in other galaxies.
An early peak at a forming star system reveals tantalizing clues about its origin.
Astronomers are now finding dozens of fast-moving runaway stars by searching for the bow shocks they create in interstellar gas and dust.
For the first time, astronomers have predicted the appearance of a supernova.
Infrared observations by the Hubble Space Telescope reveal jets from forming stars.
Following a wildly popular contest, the International Astronomical Union has named 14 stars and 31 planets that orbit them.
A new computer simulation provides a brief glimpse at what makes stellar bombs tick.
High-mass stars may outshine and outweigh the Sun, but observations show all stars may have had a similar beginning.
Astronomers have caught a giant elliptical galaxy “shimmering” as its stars pulsate.