This dreamy night-sky photo features a golden full moon rising above the landscape of Alandroal, Portugal, in Dark Sky Alqueva, the world's first "starlight tourism destination."
The launch of NASA's next Mars rover, the life-hunting, sample-caching Perseverance, is just a month away.
Summer will arrive in the Northern Hemisphere on Saturday (June 20) at 5:43:32 p.m. EDT (21:43:32 GMT). The June solstice also marks the beginning of winter for those in the Southern Hemisphere.
In a new study, astronomers report the first detection of X-rays from a sun-like star in the earliest phase of its evolution.
A spacecraft that launched a quarter century ago to study the sun has discovered its 4,000th new comet in a spree of serendipitous science.
NASA's next Mars rover will bear to the Red Planet a tribute to brave healthcare workers fighting a pandemic here on Earth.
Once again, physicists have confirmed one of Albert Einstein's core ideas about gravity and relativity — this time with the help of a neutron star flashing across space.
Mysterious pulses of radio waves from deep space can fire in regular patterns, a discovery that might help shed light on the cause of these puzzling outbursts, a new study finds.
Scientists aren't sure if space junk or a meteor caused a brilliant blue fireball seen across Western Australia.
Astronomers have revealed the atmosphere of the red supergiant star Antares in stunning, unprecedented detail.
NASA's Curiosity rover took a break from assessing ancient Martian habitability to gaze up at the Red Planet sky — where it found Earth.
A black hole shooting out gassy material at nearly the speed of light has been caught on video by NASA's Chandra X-ray Observatory.
The world's largest atom smasher has "given birth" to a set of four ultraheavy particles — called top quarks.
For the past few years, the possibility of a new (and big!) planet hanging around in the far outer solar system has tantalized scientists and the public alike. Is "Planet Nine" out there or not?
Europe's Trace Gas Orbiter spotted an emerald glow in Mars' wispy atmosphere, marking the first time the phenomenon has been spotted on a world beyond Earth.
Solar Orbiter, a joint mission by NASA and the European Space Agency, has hit its first big milestone of its sun-watching mission — and the spacecraft will soon have pictures to prove it.