The Sickle is a famous asterism in Leo, which now also hosts Mars in the evening sky. Mars has now crossed the border from Cancer into Leo, standing in the far western regions of the Lion’s domain.

Kemble's Cascade is an asterism in Camelopardalis in which a line of colorful stars appears to terminate with the small open ...

A decade after the release of "The Martian" and a decade out from the world it envisions, how close is reality to fiction?

A combination of a dynamo-generated magnetic field and massive impacts could explain the highly magnetized rocks in some ...

The waning crescent Moon contrasts nicely with Venus the morning star, with the planet quickly approaching dichotomy.

On May 21, the International Astronomical Union’s Minor Planet Center announced the discovery of 2017 OF 201, which, because ...

New Moon brings excellent dark-sky conditions for observing galaxies, nebulae, and star clusters in the sky this week.

A waning crescent Moon lies near bright Venus in the morning sky, offering a gorgeous pairing for visual observing or ...

Our satellite is a little off-balance. GRAIL data show a mass asymmetry of a few percent between its near and far sides.

Saturn and Neptune are joined by the crescent Moon in the early-morning sky as our satellite moves along the ecliptic.

JWST uncovers unexpected behavior in polar lights on Jupiter, while a Mars rover captures the first image of an aurora.

From a dark site, an 11-inch telescope will reveal several hundred galaxies here, so take your time and be sure of your ...