Observations confirm that the closest star to our solar system has a regular magnetic cycle similar to our Sun.
A new analysis suggests that a subsurface ocean might lie deep beneath the crust of Saturn’s moon Dione.
A new e-digest from the International Astronomical Union’s Minor Planet Center gives the public a head’s up on passing asteroids.
Astronomers have found a unique trait of spiral arms that supports a longstanding idea about where these patterns come from.
Astronomers have discovered a planet in the habitable zone of the closest star to the Sun.
Living in voids might be tangentially responsible for three small galaxies’ recent flurries of starbirth.
Cassini radar observations reveal a channel system on Saturn’s biggest moon, Titan, that is drowned in liquid methane.
An intergalactic cloud has slammed into the Milky Way Galaxy and left a big hole.
The dwarf planet has a paucity of big pockmarks because it has somehow erased them.
Astronomers have discovered a giant planet with an exceptionally wide orbit in a young system of three suns.
Spectral observations by NASA’s Dawn spacecraft reveal that the dwarf planet’s mysterious beacon is made of salt.
Astronomers may have solved the case of the Milky Way’s missing satellite galaxies. The solution? The galaxies never existed.
Astronomers have detected three cold gas clumps falling toward a galaxy's center — at odds with the prevailing idea for how black holes grow.
A galaxy in the midst of a merger isn’t forming stars, even though it could. Astronomers think the galaxy’s central black hole might be the reason why.
Watch a million stars age in these prize-winning simulations of globular clusters. The simulations track the stars' movements and evolution over 12 billion years.
Scientists might have found the source of an incredibly energetic particle that bored into the Antarctic ice sheet.
NASA’s Fermi Gamma-ray Space Telescope might have detected a burst from the same merging black holes that emitted the gravitational waves LIGO detected.
Planetary scientists have increasing reasons to think that some of the ringed giant’s moons are only 100 million years old.
By tracking deviations in spacecraft orbits, planetary scientists have created a high-resolution map of the Red Planet's gravitational pull.
Astronomers have identified 53 “super spirals” — spiral galaxies that are huge and incredibly luminous — as part of a project exploring archived observations.
A burst pipe flooded Harvard College’s Observatory Hill, submerging thousands of historic photographic plates underwater. Recovery is now under way.
Professional and amateur astronomers working together have found a young exoplanet in the Hyades star cluster. The planet is weirdly large, given its host star.
Astronomers have detected hundreds of galaxies lying hidden behind the Milky Way's disk, many of which belong to the so-called Great Attractor, or Norma Supercluster.
How much galaxy clusters huddle together depends in part on how fast these clusters formed — and that formation rate depends on dark matter.
The massive Smith Cloud falling toward our galaxy’s disk is likely from our galaxy, not a visitor.