The Cassini spacecraft is beginning its final set of daring orbits with breathtaking images of the Saturn system and rings
These are the first images of the planet taken as the Cassini spacecraft made the first of its 22 planned dives between its rings.
If a migrating exoplanet dragged a Europa-like moon closer to its host star, the moon’s icy shell could melt into liquid oceans and breathable air
The space agencies just announced a bold plan to search for aliens on Jupiter’s icy moon through a joint American-European mission
The moon of Saturn is best known for its watery plumes, which make it a good place to seek life – and the cracks that release the plumes may tell us more
The Cassini spacecraft just made its final flyby of the small moon Atlas, grabbing the best pictures yet and showing a surprising softness
Earth’s magnetic field provokes layers of iron and magnesium in the atmosphere, but Mars has no such field - so finding similar layers is a surprise
The space agency just announced the recipients of its Innovative Advanced Concepts programme, which kickstarts researchers’ so-crazy-it-just-might-work ideas
A rare retrograde asteroid has been spotted in Jupiter's orbital zone - and nudges from the giant planet may have kept it stable there for a million years
The NASA Transition and Authorization Act instructs the space agency to send humans to Mars, robots to Europa and look for life - but not to study Earth