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

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 ...

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