The Last Quarter Moon floats in the predawn sky, preparing to occult the Pleiades from some parts of the world.

Today in the history of astronomy, a photo is shot. The moon Phoebe will be discovered in it months later.

Space launch deregulation begins as President Trump signs order to relax FAA licensing and amend Part 450 rule to accelerate ...

The waning Moon passes Jupiter, Venus, and Mercury before dawn, while Titan’s shadow transits Saturn in the sky this week.

Using AI, astronomers discover a new type of supernova, SN 2023zkd, the strongest evidence yet of a dying star being ...

The largest body in the main belt comes to a brief standstill in the sky, visible before sunrise in Cetus the Whale.

The sidereal day is defined to be the length of time for the March equinox to return to your celestial meridian. Compare this ...

Researchers have spent decades trying to pin down exactly how long a day on Venus lasts. Finding the answer cuts to the core of fundamental mysteries about the planet.

Nearly five-month mission concludes as agency continues its human presence on the International Space Station.

Plus: The August Full Sturgeon Moon shines, the colorful double star Albireo sparkles, and Mercury reappears in the sky this ...

The solar system’s smallest planet is just now becoming visible before dawn. Bright Jupiter and Venus point the way.

Alpha Centauri planet candidate discovered by JWST orbiting a Sun-like star. Learn about this potential gas giant in our ...