Meet comet C/2025 F2 (SWAN): a celestial body glowing green as it swings around the sun, currently visible in the early morning hours with backyard gear, such as small telescopes or binoculars.

However, Article II of the United Nations' 1967 Outer Space Treaty states that no nation can claim sovereignty or ownership over any celestial body. Article VI further dictates that nations are ...

The space telescope's image of a odd-looking spiral galaxy is, in reality, two distant galaxies overlapping each other.

WHEN ROBERT HOOD LOOKED AT THE DE HAVILLAND D.H. 106 COMET fuselage sticking halfway out of a hole cut in the huge hangar at the Museum of Flight’s restoration facility in Everett, Washington ...

Astronomers may have just identified a rare example of a "three-body problem" hiding in plain sight beyond the solar system's most distant planet. If the observation can be confirmed, it suggests ...

Exoplanets are already known to disintegrate slowly, but none as quickly as BD+05 4868 Ab. It loses one Mount Everest per orbit.