Models of galaxy formation reveal how stellar forces give invisible matter the boot.
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.
A pair of stellar titans, whipping around each other as a close-knit orbital team, reveals a sort of â€œbattle 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.
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.