NASA's latest Mars rover has made a discovery that could point to the presence of life on Mars in the distant past.
The mysterious object, which zoomed off at high speed, was seen in the vicinity of a Coast Guard plane.
The end of the spacecraft's current mission was marked by a series of sonic booms over Florida on Saturday.
The vehicle, which remains shrouded in mystery, has been described as a 'reusable experimental spacecraft'.
The space agency has confirmed that its recent mission successfully altered the trajectory of the target asteroid.
The asteroid that wiped out the dinosaurs was enormous - but it was by no means the largest ever to hit our planet.
Astronomers have announced that they have identified a relatively nearby exoplanet with the potential to host alien life.
The next-generation space telescope has achieved what astronomers are calling 'a transformative moment'.
A fatal plane crash 12 years ago has since been blamed on a crocodile that got loose during a bungled smuggling attempt.
Scientists have identified a relatively nearby exoplanet that appears to be made up almost entirely of water.
A new study has suggested that extraterrestrials could hitch a ride across the cosmos on rogue extrasolar worlds.
Known as 'trioxides', these highly reactive chemicals could be contributing to health and environmental problems.
These giant 'scratches' on the surface of the Red Planet were captured on camera by ESA's Mars Express orbiter.
An airline flight from Israel to Turkey was forced to turn around after passengers received unnerving images on their phones.
Taken from a plane in 1971, the image shows what appears to be a metallic saucer flying through the air.
A theoretical new type of telescope could make it possible to obtain close-up views of extrasolar worlds.
The act of destroying the Moon was put forward as a way to solve many of our planet's problems.
Over the last 30 years, scientists have succeeded in identifying a staggering 5,000 planets in distant solar systems.
The potential existence of an undiscovered planet in our own solar system has intrigued astronomers for years.
With a wingspan greater than that of an entire football field, this gargantuan aircraft is a sight to behold.