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

Prior to flybys, scientists used mathematical laws and observation to determine the characteristics of the planets.

In this episode, Astronomy magazine Editor Dave Eicher invites you to head out as twilight begins on the morning of August 19 to see a thin crescent Moon. Below the Moon, you’ll easily spot Jupiter ...

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

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

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

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

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

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

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

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

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