During the total solar eclipse of Aug. 18, 1868, two astronomers, Pierre Jules César Janssen of France and J. Norman Lockyer ...

One of the last few Titan shadow transits of the year takes place overnight tonight, with several of Saturn’s other moons ...

Today in the history of astronomy, the second moon of Mars is discovered.

NGC 6910 is a bright open cluster in Cygnus the Swan, visible overnight as the Summer Triangle flies high around local ...

Astronomers have shattered the cosmic distance record by measuring the distance to the most remote galaxy ever seen in the universe.

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

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

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

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

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

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

ULA Vulcan Launch completes its first National Security Space Launch mission, taking the reins from the Delta IV Heavy for ...