Saturn’s two-toned moon Iapetus passes through superior conjunction, sitting just south of the ringed world this morning.

Astronomers have detected helium leaking from a rocky exoplanet, a sign that the planet may have an atmosphere. If confirmed, the finding represents the first such detection around an Earth-like world ...

Tonight we’re focused on Jupiter, as two of its Galilean moons cross the planet’ disk this evening. East Coast observers can zoom in on the gas giant shortly after sunset to see Io alone to the planet ...

SpaceX flies a classified NRO mission from Cape Canaveral, China launches back-to-back Long March rockets in a single day, ...

There are big challenges associated with such a mission, from readying a craft quickly to finding the comet and sending data ...

The waning Moon steps up to form a triangle in the early-morning sky with two distant planets: Saturn and Neptune.

When it comes to your astrophotos, capturing the right wavelengths makes a big difference. Here's how to choose the best filter for the job.

Mercury reaches its greatest western elongation, Iapetus passes close to Saturn, and the Moon occults the Pleiades in the sky ...

Rising shortly after sunset, July’s Full Moon, called the Buck Moon, dominates the sky tonight with its bright light.

Solar and lunar eclipses both occur this month, as Mars and Jupiter meet in the early morning and the Perseid meteor shower peaks.

The Alpha Capricornid and the Southern Delta Aquariid meteor showers peak overnight, but the bright Moon will run ...