NASA's Interstellar Boundary Explorer (IBEX) spacecraft has helped explain the striking narrow ribbon of charged particles emanating from the boundary of the solar system.
So-called super-Earths - rocky exoplanets much larger than our own - may actually be more like mini-Neptunes.
Astronomers believe they've worked out why there are so many fewer dwarf galaxies than predicted: they're moving so fast that their gas is simply whipped away.
We can all be picky at times, but you probably think of this planet as reasonably bearable. In a new model for what constitutes a habitable zone, however, the Earth barely scrapes over the bar.
NASA's ability to track satellites and orbiting spacecraft is about to get a big boost, following the launch last night of a next-generation communication satellite.
Astronomers using the European Space Agency's Herschel Space Telescope have spotted a star that appears to be making new planets, despite being well past the age at which it would be expected to do so.
Ridges in impact craters on Mars appear to be the fossilized remnants of underground cracks through which water once flowed.
Iran's successfully given a live monkey a round trip into space, the country's Al-Alam television channel reports.
NASA has signed up to join the European Space Agency's (ESA's) Euclid mission, a space telescope due to launch in 2020 and designed to investigate dark matter and dark energy.
Astronomers are baffled by the discovery of a pulsar - a tiny spinning stars, heavier than the sun and smaller than a city - that emits different types of radiation at different times.
In some dramatic images, astronomers have for the first time observed magnetic braids of super-hot matter on the surface of the sun, the first clear evidence of energy transfer from its magnetic field to the solar atmosphere or corona.
DARPA has released a video detailing some of the progress it's made with its Phoenix project for repurposing existing satellites.
Astronomers have made the most precise measurement ever of how the universe has cooled down during its 13.77 billion year history - putting the Big Bang theory to the test.
A few years ago, if a company had stepped up and said it planned to send unmanned spacecraft to explore the possibility of mining asteroids in near earth orbit, quite a number of us probably would have politely chuckled.
University of Leicester planetary scientists believe they've found the first clear evidence that auroras occur outside our solar system.
Astronomers believe they've worked out the source of a mysterious burst of gamma rays that irradiated the Earth in the 8th century.
NASA's Mars Reconnaissance Orbiter (MRO) has found evidence that McLaughlin Crater once contained a lake fed by flowing groundwater.
Drifting sand is steadily filling the craters of Saturn's largest moon, Titan, making it look much younger than it is.
Call it a bouncy castle at your peril: it's an expandable space habitat, don't you know. And it's to be the next big addition to the International Space Station, arriving in 2015 for a two-year trial.
The European Space Agency is teaming up with NASA for a mission that will take human beings beyond Earth orbit for the first time in 40 years - and eventually, it says, further than ever before.