Two projects are mapping the distribution of dark matter in the universe, probing scales both large and small.
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 galaxy-size blob of gas discovered eight years ago by a Dutch schoolteacher has galvanized the study of the spectral remains of once-bright quasars.
A rare type of gravitational lens offers astronomers a close look at a young, dusty galaxy manufacturing hundreds of stars a year.
A team of astronomers compared two images taken 18 years apart to catch the dramatic evolution of a forming star and its surroundings.
Dozens of galaxy clusters confirm that dark matter particles slip right past each other within messy cluster mergers.
NASA has selected the design for its Asteroid Redirect Mission, opting to retrieve a boulder from a larger asteroid.
Astronomers have found a set of new dwarf galaxy candidates near the Milky Way Galaxy, a discovery crucial to understanding dark matter.
For the first time, astronomers are watching as a supernova’s light bends around a massive galaxy on its way to Earth.
Astronomers have found two just-born star clusters an incredible 16,000 light-years above the plane of the Milky Way galaxy.
New observations suggest that several dozen low-mass stars, and eventually perhaps even planets, are forming just 2 light-years from our galaxy’s supermassive black hole.
Cepheid variable stars are helping astronomers see what our galaxy looks like from within.
New observations of the Teacup Galaxy show that even black holes with wimpy radio jets can quench a galaxy's star formation. An unassuming nearby galaxy nicknamed The Teacup (more formally known as J1430+1339) hides a tempest inside. The supermassive black hole at this galaxy's center is chowing down furiously on gas — seen from...
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.
Citizen scientists are exploring exoplanets’ birthplaces, classifying more than 1 million infrared sources and finding 37 disk candidates (so far) for follow-up study.
As the Kepler mission shifts into its new mode of operations, multiple new searches for exoplanets are in the works.
The WorldWide Telescope (WWT), featured in the April 2015 issue of Sky & Telescope, isn't just another piece of planetarium software. Its incredible breadth and depth of data allow users to explore the universe in an interactive way. Coauthors Curtis Wong (Microsoft Research) and Alyssa Goodman (Harvard University and Harvard-Smithsonian Center for Astrophysics) teamed...
Amidst the release of a treasure trove of astronomical data, scientists announce the most precise “standard ruler” yet for cosmological distances.
The Hubble Space Telescope has turned its ultraviolet, visible-light, and near-infrared eyes to the queen of galaxies, M31, capturing the biggest and sharpest image yet of our neighbor.
NASA’s NuSTAR mission recently returned a striking image that shows the Sun’s active regions crackling with X-rays.
In our March 2015 issue, we ask noted amateur and professional astronomers to highlight the astronomy apps they use most. These are apps that every astronomer should have in their back pocket, ranging from practical planetarium and weather apps, such as Scope Nights and Sky Safari 4, to science guides, such as Exoplanet and...
The International Astronomical Union is hosting a public contest to name five of Mercury's craters, with a deadline of January 15.
In the February 2015 issue of Sky & Telescope, author Marcus Woo walks readers through the science of cosmic voids. Here, videos demonstrate a sense of cosmic perspective, taking the reader on flights through the universe both theoretical and observed.