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.
A new study has looked into the possibility that our planet is not simply a ball of water, metal and rock.
Could our planet one day stop spinning and what would happen if it actually did ?
Scientists have discovered a previously unknown opening situated 62 miles beneath the planet's surface.
Scientists have highlighted the key role that iron has played in the evolution of life on Earth.
Astronomers have identified a new extrasolar planet that is thought to be comprised of more than 80% iron.
A diamond that originated deep beneath the planet's surface has been found to contain a new type of mineral.
Some extrasolar worlds are so large and so hot that they experience weather like nothing seen on Earth.
Evidence of a planet has been found in a distant galaxy 28 million light years away.
A cargo plane reportedly encountered a mysterious object during a routine flight over Mexico last year.
The latest mission of the mysterious space plane has so far lasted 500 days and nobody knows what it's up to.
Caves dotted around the surface of the Red Planet could provide a safe haven for future human explorers.
Scientists searching for life-bearing exoplanets have identified a new class of potentially habitable world.
Some of the world's highest and coldest places contain important, hidden clues about our planet's history.
Scientists have identified a mammoth that roamed a distance equivalent to circling the entire planet twice.