Jeanna Bryner

Models of galaxy formation reveal how stellar forces give invisible matter the boot.

Here's how sexy, spiral star factories morph into shapeless blobs of old stars.

Astronomers find evidence for morning drizzles made of methane over Titan.

Astronomers closer to solving mystery of Saturn's moon Iapetus.

Japanese spacecraft takes first high-definition video of Earth.

Astronomers model 14 types of planets that could exist in our galaxy.

Results don't confirm or deny existence of Martian water.

Neptune's warmer south pole responsible for methane hot spots.

Two dwarf galaxies are not long-time companions of the Milky Way.

It could've been a two-rock drama that caused the dino extinction, not one.

Alien worlds, once hidden from knowledge, are now being discovered in droves.

Sound waves can hitch a ride along magnetic fountains that shoot out from inside the Sun and help to heat up the solar atmosphere.

Monster black holes can be loners, lurking in cosmic voids where stellar food is somewhat unavailable and neighbors seem nonexistent.

Newly discovered stellar streams that arc around our galaxy might be the remnants of cannibalized star clusters and galaxies.

A team of amateur and professional astronomers has discovered a mammoth orb more than 13 times the mass of Jupiter that is considered an "oddball" among its exoplanet relatives.

Solar storms carrying a billion tons of charged gas through space let out a scream before they unleash radiation storms that can damage spacecraft, astronauts and electrical systems on Earth.

Astronomers discover why runaway black holes are so uncommon and what launches the rarities.

A pair of stellar titans, whipping around each other as a close-knit orbital team, reveals a sort of “battle of the winds."

Astronomers have discovered 28 new planets outside of our solar system, one of which is a hybrid Earth-Neptune object with a rocky core surrounded by a shell of ice.

Scientists unveiled today some of the first 3-D images of the violent electrical storms that rage within the Sun’s atmosphere.

Astronomers have recorded heavenly music bellowed out by the Sun?s atmosphere.

A newly spotted pair of tiny stars that holds the record for the longest-distance celestial embrace is bound by only a thread of gravity and might one day break up.

Results from a recent study of the microbes in China's remote deserts could help astrobiologists refine their maps for uncovering Martian life.

Prompted by the arrest of now ex-astronaut Lisa Nowak, NASA has announced the committee members who will review the mental and other health services available to astronauts.