In 1996, shortly after arriving at Jupiter, Galileo made a surprising discovery: Ganymede had its own magnetic field

Evidence from two lunar missions shows the Moon's water is not confined to a particular region and is not easily accessible

A recent NASA study suggests that there may be another explanation for patterns in disks of dust and gas around young stars

At NASA's Goddard Space Flight Center in Greenbelt, Maryland, a landslide potential map was generated by the global Landslide Hazard Assessment for Situational Awareness (LHASA) model

NASA scientists have shown through direct satellite observations of the ozone hole that levels of ozone-destroying chlorine are declining, resulting in less ozone depletion

Scientists from NASA and NOAA announced that the hole in Earth's ozone layer that forms over Antarctica each September was the smallest observed since 1988

Magnetospheres deflect high-energy, charged particles that are spewed out by the Sun and protect the planets' surfaces from harmful radiation

New work will help astronomers allocate scarce observing time to the most promising candidates for habitability

The Atmospheric Tomography, or ATom, mission is the first to survey the atmosphere over the oceans

There are a few possible explanations for the universe's excessive speed. One possibility is that dark energy, already known to be accelerating the universe, may be shoving galaxies away from each other with even greater—or growing—strength

The Hubble image reveals details as small as 20 to 30 miles across

The moon—provisionally designated S/2015 (136472) 1 and nicknamed MK 2—is more than 1,300 times fainter than Makemake

The cosmic rays that are the subject of this study come from outside our solar system but within our Galaxy and are called galactic cosmic rays