Gas flows in the early universe may have kept clouds from collapsing too soon, enabling them to grow into massive black hole seeds.
Astronomers have detected more extremely energetic cosmic particles coming from one side of the sky than the other.
A new analysis maps out water across the lunar surface, revealing how its abundance changes with latitude.
Scientists are considering whether the mysterious “force” accelerating the universe’s expansion changes with time.
A new study suggests that the seven-planet dwarf star could be much older than the Sun.
Solar astronomers may have finally detected gravity waves in our star’s core, revealing that the Sun’s central region rotates about four times faster than the outer layers.
Astronomers have potentially detected a stratosphere in the atmosphere of a hot Jupiter.
High-powered simulations suggest that half of the material in the Milky Way could come from other galaxies.
Scientists with the gravitational-wave observatory announce another discovery, this time of a black hole merger twice as far away as previous detections.
Astronomers have confirmed the existence of the seventh planet around the ultracool dwarf star TRAPPIST-1.
Mars was once far wetter than it is now — but just how much rain fell, and when?
Astronomers have more evidence that the hidden ocean inside Saturn’s moon Enceladus is heated by hydrothermal activity.
Planetary scientists think the Sun may inadvertently create a transitory, tenuous atmosphere around the dwarf planet Ceres — and in an unexpected way.
NASA’s MAVEN mission has confirmed that the solar wind stripped the Red Planet of its atmosphere.
Astronomers have found newborn stars in gas pouring out of a galactic nucleus.
The star with seven exoplanets puts out enough high-energy radiation to tear away the inner planets’ atmospheres in a few billion years.
Astronomers have found seven Earth-sized planets around a cool red dwarf, all of which have the potential for liquid surface water.
Astronomers have discovered long filaments of cold gas — the ingredient for making stars — cocooning giant bubbles inflated by a black hole.
The Dawn spacecraft has detected organic compounds on the dwarf planet Ceres.
Astronomers have discovered a giant cosmic void that explains why our Local Group of galaxies is moving through the universe as fast as it is.
Astronomers suspect the Sun’s closest stellar neighbor desiccated its potentially rocky exoplanet, destroying the planet’s chances for habitability.
Astronomers have discovered an object in the active galaxy Cygnus A that wasn’t there before.
Astronomers have combined data from the Voyager spacecraft and the Hubble Space Telescope to probe the stuff between the stars.
In our March 2017 issue we included a diagram of all small, confirmed exoplanets in their stars’ habitable zones. Here’s the saga of how we decided which planets to put on that list.
Astronomers suspect that a binary star system in Cygnus is preparing to make one star of two, erupting in a red nova visible to the naked eye.