The most luminous supernova ever discovered, ASASSN-15lh, challenges a popular theory for blazingly bright exploding stars.
Astronomers have created an age-map of 70,000 stars spanning our galaxy, ushering in a new era of galactic archaeology.
An innovative and tiny thruster design could prove the future of interplanetary exploration with the tiny satellites known as CubeSats.
For the first time, astronomers have predicted the appearance of a supernova.
Astronomers studying hot Jupiter exoplanets revealed when and how clouds form on these alien worlds.
A new study shows that about half of Kepler’s giant exoplanet candidates aren’t real planets. But astronomers expected this.
A new computer simulation provides a brief glimpse at what makes stellar bombs tick.
Astronomers at the Extreme Solar Systems III conference announced several exciting results this week.
Astronomers have spotted what appears to be a regular signal coming from the blazar PG 1553+113.
High-mass stars may outshine and outweigh the Sun, but observations show all stars may have had a similar beginning.
The presence of stars just 100 million years old in the Milky Way Galaxy’s central regions confirms our galaxy’s nonviolent past.
New research connects stellar pulsations to these stars’ inner, unobservable magnetic fields.
When astronomers went searching for the planets that must exist around HL Tau, they came up empty — and future searches may not fare much better.
A Hubble legacy program has returned high-res pictures of Jupiter, revealing changes to the Great Red Spot and mysterious new wisps in the North Equatorial Band.
The incredibly popular novel, and now movie, The Martian draws people to the Red Planet with realistic detail. Explore the Red Planet not just in fiction but in reality with our Mars globe and map.
Some of the universe’s most luminous galaxies are also the most mysterious. New simulations shed light on how these galaxies formed.
The answer is a tantalizing maybe. Astronomers are investigating whether an increase in the number of flares from Sgr A* are due to the recent close passage of a dusty object known as G2.
Astronomers are investigating a new technique for finding close pairs of supermassive black holes, and they might have found one in the nearest quasar.
A lab experiment has all but nixed one of the theories of dark energy, a mysterious force pushing the universe apart.
The Gemini Planet Imager has discovered its first exoplanet, a young Jupiter still glowing with the heat of its formation.
The cover story of the October 2015 issue features the conundrum of massive star formation: how do these stars can form at all in the hostile environment they themselves create? Here, you'll find accompanying videos.
Recent headlines proclaim that the universe is dying, but we’ve actually known that for decades. Here’s what’s really interesting about recent research on the nearby universe.
Super-Earth HD 219134b is just 21 light-years away, orbiting a nearby orange star that you can see from your backyard.
On Earth, wind can transform entire landscapes - turns out the same is true in space. Galaxy NGC 4921 faces an intracluster wind that's eroding its star-forming terrain.
The digital archive of Sky & Telescope magazine is an essential resource for astronomers at any level. And this weekend only, get $25 off.