The US military's mysterious X-37B has spent almost a year in space on its latest secretive mission.
Scientists have discovered that the Moon may not be the only natural satellite in orbit around our planet.
Scientists have determined that a significant percentage of planets in our galaxy may be covered in water.
The extrasolar planet known as Kelt-9b is so hot that its atmosphere contains vaporized iron and titanium.
The huge object is 12.7 times the mass of Jupiter and has a magnetic field 200 times more powerful.
NASA's Transiting Exoplanet Survey Satellite (TESS) is now on the hunt for habitable extrasolar worlds.
The third rocket-powered test flight of SpaceShipTwo provided its pilots with a spectacular view of our planet.
Scientists believe that they have identified a body of water situated beneath the planet's south polar ice cap.
The discovery means that the gas giant has a total of 79 moons - more than any other planet in the solar system.
Astronomers at the European Southern Observatory have photographed a planet forming around a star.
As if space junk wasn't already enough of a problem, a war in space could litter the planet's orbit with tons of debris.
The dust storm that left the Opportunity rover out of commission is now classed as 'planet-encircling'.
Astronomers have found a solar system 160 light years away with three planets roughly the size of our own.
Scientists have come up with an alternative explanation for the peculiar orbits of some distant objects.
The enigmatic dwarf planet is home to a 'riot of processes' that continue to surprise researchers.
The launch of two new satellites in to orbit will enable scientists to study the evolution of our planet's climate.
A small solar system object with a strange orbit has hinted at the presence of a large, unknown world.
An investigation by an Australian TV news program has suggested that the pilot crashed the plane on purpose.
When our star eventually dies, it will go out in a blaze of glory and produce what is known as a planetary nebula.
Scientists have been looking to the past to help them determine the whereabouts of the elusive ninth planet.