New propulsion systems could enable a mission to Sedna

In the outer reaches of our solar system, far beyond the orbit of Pluto, lies Sedna, one of the most mysterious objects ever discovered. This reddish dwarf planet follows such an extreme orbit that it takes more than 11,000 ...

The solar system's greatest mystery may finally be solved

For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar system. Now, a team of researchers have taken a completely different approach to this cosmic detective ...

An astronaut called a satellite 'impossible'

Not much can surprise someone who partook in four shuttle missions and three space walks during a 36-year career with NASA. Let alone, for someone who has spent their life studying space and space travel, the proposal of ...

NASA shares new views of our galactic neighbor, Andromeda

The Andromeda galaxy, also known as Messier 31 (M31), is the closest spiral galaxy to the Milky Way at a distance of about 2.5 million light-years. Astronomers use Andromeda to understand the structure and evolution of our ...

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