Training in Antarctica or on the International Space Station won't provide adequate preparation for human settlement on Mars, according to new research.
Researchers simulated conditions that occur when a piece of the planet is ejected into space, and their findings could alter assumptions about the water budget of Mars.
Researchers eyeing seasonal changes at the north and south poles of Saturn observe the waxing and waning of aerosols in the planet's atmosphere.
The rover Discovery has advanced scientific understanding of Mars over the past 13 years, and here are images of some of the highlights.
The narrow rings of Saturn behave in similar ways to those of Uranus, which might not be surveyed by a probe until the 2020s or 2030s.
More caution is needed in describing newly-found exoplanets as habitable given the limitations of observations, researchers warn.
Pluto's loss of planetary status in 2006 remains controversial. Now a new definition is being proposed that would restore Pluto while increasing the number of "planets" in our solar system to over 110.
A space-based gravitational wave observatory may be launched ahead of schedule, enabling scientists to detect ripples in space, a phenomenon first envisioned by Albert Einstein 100 years ago.
Discovering several Earth-size planets around TRAPPIST-1 means the likelihood of finding life within the habitable zones of other star systems could be much greater than previously thought.
Future scans of the TRAPPIST-1 exoplanets' atmospheres could reveal if any possess life.