In the mid-nineteenth century, one of the most massive stars in our Milky Way galaxy suddenly got much brighter. For ten years, indeed, it was the second-brightest star in the sky.
The Swiss have a reputation for cleanliness and order, and now they're planning to tidy up space.
NASA astronomers using the Hubble Space Telescope have found a cluster of young, blue stars encircling the first intermediate-mass black hole ever discovered.
Venus's rotation is slowing down - and scientists aren't at all certain as to why.
New images from the European Space Agency’s Planck mission have revealed previously undiscovered islands of star formation, along with a mysterious haze of microwave emissions in our Milky Way galaxy.
US President Barack Obama’s proposed 2013 budget would effectively slash $226 million from NASA’s Mars exploration program.
Europe's new Vega rocket has successfully lifted off from the Kourou spaceport in French Guiana, taking nine satellites into orbit.
The supermassive black hole known as Sagittarius A has been observed emitting X-ray flares, lasting a few hours, about once a day.
Deep in the heart of the southern Milky Way lies a stellar nursery known as the Carina Nebula - located 7500 light-years from Earth in the constellation of Carina (The Keel).
ESA says its Mars Express probe has returned some of the strongest evidence yet that an ocean once covered part of Mars.
NASA's received over 6,300 applications to join its astronaut corps - twice as many as usual.
Mars may have been an arid planet for over 600 million years, making it too hostile for any life to survive on the planet's surface.
Iran says it's launched an observation satellite, claiming it will be used to collect weather data.
Astronomers have discovered a potentially habitable planet right on our doorstep - just 22 light years away.
A camera aboard one of NASA's twin Gravity Recovery And Interior Laboratory (GRAIL) lunar spacecraft has sent back footage of the far side of the moon.
Space Exploration Technologies (SpaceX) has successfully test fired its new engine, SuperDraco.
After initial suggestions that death-ray-wielding Americans were to blame, Russian space agency Roscosmos has concluded that its lost Martian probe, Phobos-Grunt, was cripped by space radiation.
NASA has for the first time analyzed the 'alien matter' in the interstellar wind.
When scientists discovered two great swaths of radiation encircling Earth in the 1950s, it spawned exaggerated fears about "killer electrons" and space radiation effects.
Space weather forecasts are about to get more accurate - just in time for a period of increased solar activity.