This gaseous atmosphere of our neighboring galaxy is about 1,000 times more massive than previously estimated and stretches halfway to the Milky Way.
Scientists think most of the observed activity on Enceladus represents curtain eruptions from the “tiger stripe” fractures, rather than intermittent geysers along them.
New research finds that water-rich asteroids similar to those found in our solar system are plentiful in the galaxy.
This burst of radiation was the most powerful so far this year and already has resulted in a radio blackout.
A team discovered an exceptionally luminous galaxy more than 13 billion years in the past; it existed so long ago that it appears to be only 100 million years old.
The ability to peek into the atmospheres of rocky “super-Earths” and observe conditions on their surfaces marks an important milestone toward identifying habitable planets outside the solar system.
Further observations by astronomers using the Green Bank Telescope revealed that this pulsar is part of only a handful of double neutron star systems.
Clear evidence now suggests that the heating mechanism depends on regular but intermittent explosive bursts of heat, rather than on continuous gradual heating.
Scientists have discovered an exoplanet with Saturn’s mass and Jupiter’s radius orbiting a small, cool star.
This finding may help astronomers understand how the largest black holes were able to grow so rapidly in the early universe.
With four years and 4,105 orbits around the planet, the spacecraft determined Mercury's surface composition, revealed its geological history, discovered its internal magnetic field is offset from the planet’s center, and verified its polar deposits are dominantly water ice.
The space telescope has observed a baffling X-ray glow at the heart of the Milky Way that could involve different classes of stellar corpses.
New observations demonstrate how the different dusty pillars of this iconic object are distributed in space and reveal many new details, including a previously unseen jet from a young star.
After a mission of nearly 11 years, the spacecraft has run out of fuel and will smash into the planet's surface at about 3:26 p.m. EDT.
The team discovered the planets by detecting a wobble of the star HD 7924 as a result of the gravitational pull of the planets orbiting around it.
Scientists interpreted the latest image data to reveal that the dwarf planet has broad surface markings – some bright, some dark – including a bright area at one pole that may be a polar cap.
Despite young molecular clouds containing far less oxygen than the Sun, theorists still found as much water vapor in the early universe as we see in the Milky Way today.
Observations revealed new properties of the first exoplant ever discovered around a normal star — 51 Pegasi b.
Studies show that supernovae with strong engines and lighter particles produce gamma-ray bursts.