A higher mass for Cygnus X-1, the first black hole to be discovered, challenges ideas about the evolution of massive stars.
New computer simulations suggest that the "beating" of Pluto's frozen heart drives weak winds on this remote world in the outer solar system.
Astronomers have announced the discovery of Proxima Centauri c, an inhospitable super-Earth just 4.3 light-years away.
Scientists have caught a powerful flare of submillimeter-wavelength radiation from a young star in the Orion Nebula.
Collision with a Mars-size body — the same body thought to have formed the Moon — might also have brought life-supporting volatile elements to Earth.
Infant worlds might gobble up dust quickly, the interstellar environment might feed protoplanetary disks, or planet-building dust could be hiding in plain sight. Although disks of gas and dust around young stars are a necessary precursor to planet formation, an expanded survey of stars in our Galaxy confirms earlier doubts…
Scientists studying microscopic minerals found in a meteorite have discovered evidence of the feistiness of the toddler Sun.
Scientists have discovered that a supervolcano likely created a mysterious rock formation on Mars some 3 billion years ago.
New observations have helped astronomers identify the source of a 2,000-year-old supernova explosion. But this blast, and the neutron star that created it, seem to have a curious history that defies explanation.