Get your scope ready for a rare event this Friday night when one after another three of Jupiter's brightest moons and their shadows parade across its face.
For the second time in as many months, the periodic comet 15P/Finlay has surged in brightness. Spot it soon — before the Moon interferes — using our exclusive sky charts.
Astronomers say that a once-in-26-year eclipse, predicted to occur in January, probably happened months ago without anyone seeing it.
As the Kepler mission shifts into its new mode of operations, multiple new searches for exoplanets are in the works.
Hubble Space Telescope observations are enlightening astronomers about the evolution of galaxies in the distant universe.
It's been 11 years since the British-built Beagle 2 lander dropped to the Martian surface and disappeared without a trace. Now we know what happened to it.
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.
Will you brave the cold Friday morning to witness the conjunction of Saturn and the waning Moon?
Astronomers poring through two decades of archival and survey observations have discovered what looks like a pair of supermassive black holes closing in for a merger.
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.
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.
Where, exactly, did our oceans come from? New research suggests that asteroids might have both delivered and removed lots of water — and that Earth itself might have locked it away deep inside.
NASA’s NuSTAR mission recently returned a striking image that shows the Sun’s active regions crackling with X-rays.
Our downloadable monthly podcast offers highlights for stargazing in January, how to find the planets, and a special look at the Pleiades star cluster
Samples taken from two drill holes on Mars support the idea that Mars lost a whole lot of water fairly early in its history.
A new Comet Lovejoy, C/2014 Q2, is heading our way. It may brighten to 5th magnitude from late December through much of January as it climbs into excellent viewing position for the Northern Hemisphere, high in the dark winter sky.
Over the course of ten years, a once-brilliant quasar seems to have stopped gobbling down nearby gas.
Thousands of telescopes are given and received as gifts during the holidays. But once you've assembled your new treasure, then what? The editors of Sky & Telescope magazine point the way.
A highly successful spacecraft has ended its mission after returning nearly a decade of data on Earth's nearest planetary neighbor.
The International Astronomical Union is hosting a public contest to name five of Mercury's craters, with a deadline of January 15.
The exact location of Philae’s landing site remains unknown, though the site’s topography might allow the lander to operate longer than planned. Meanwhile, Rosetta is detecting organics and heavy elements even when Comet Churyumov-Gerasimenko is far from the Sun.
In a quartet of high-quality videos, Sky & Telescope editors offer newcomers solid, objective tips on how to buy, use, equip, and care for new telescopes.
NASA’s Curiosity rover has detected both methane in Mars’s atmosphere and carbon-bearing organic compounds in its rocks. But it’s unclear where these molecules come from — or whether there’s any biological connection.