Nola Taylor Tillman

Solar scientists look back on what we've learned in the year since the Great American Solar Eclipse.

NASA has met or exceeded many of the goals set by the National Academies of Sciences, Engineering and Medicine in the 2013-2022 planetary decadal survey, according to a new midterm assessment.

The globular cluster Omega Centauri hosts an estimated 10 million stars, but they may be too tightly packed to hold on to habitable planets, a new study suggests.

It turns out, exoplanets can be as sweet as a trip to the state fair: Two worlds discovered by NASA's Kepler Space Telescope have about the same density as a package of cotton candy.

A new technique that analyzes clashing observations may help solve the mystery behind the expansion of the universe.

Forty years ago, Pluto's largest moon Charon was discovered.

Studying the angles of river features on Mars helped a trio of scientists determine that the water fell from the air rather than seeping up from the ground.

IceCube Neutrino Observatory principal investigator Francis Halzen talks about how researchers worked together to track a high-energy neutrino to its source for the first time.

IceCube principle investigator Francis Halzen discusses how the unique observatory was built and the plans for its future.

The global dust storm currently raging on Mars shouldn't disrupt the touchdown of NASA's InSight lander this fall, agency officials said.

Astronomers now have a much better idea of just how much the Milky Way weighs.

The hunt for E.T. may have gotten more difficult. New research suggests that alien life may not be as widespread as we had hoped.

A rare, midsize black hole has been spotted as it devours a star. Intermediate-mass black holes are typically challenging to spot; the new finding is the best observation to date.

The two-century-old mystery of what causes a star to dim for two years out of every 27 may be close to being solved, thanks to the ESA's Gaia spacecraft.

Violent collisions between two galaxies of equal sizes are more likely to power up both of the supermassive black holes at the galactic centers.

In a planetary-science first, astronomers used their knowledge of Jupiter's magnetic field to model what kinds of radio signals might be emitted naturally by the fields of smaller, rocky worlds.

Two new studies shed light on the cosmic dust that's likely responsible for the weird and dramatic dimming of "Tabby's star."

Small but rowdy space rocks pushing and jostling one another may have created the unusual orbits some astronomers cite as the signature of the hypothesized "Planet Nine," a new study suggests.

Cascades of black hole collisions could lead to the formation of more-massive black holes.