Venus is set to reach dichotomy today, so take the chance to view it half-lit through a telescope in the evening sky.

As Gemini rises shortly before the Sun this morning, the planet Mercury is just over 7° due south of the constellation’s beta star, Pollux. An hour before sunrise, nearly all of Gemini has cleared the ...

Mars and the crescent Moon hang together in the early-morning sky, straddling the border of Gemini and Taurus.

Astronomers refer to elements heavier than helium as metals. Metal-rich naked-eye stars include Mu Leonis, Sirius, and Alpha Centauri.

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

A total eclipse of the Sun coincides with the peak of the annual Perseid shower, plus Venus reaches dichotomy in the sky this ...

Some 1.3 billion years ago, when multicellular organisms were just emerging on Earth and life was still confined to the ocean, two behemoth black holes smashed together in a far-flung galaxy. The ...

A Long March 7A breaks apart less than two minutes after liftoff, and SpaceX runs its routine Starlink cadence from both coasts.

This rich grouping of young suns shines brightly in Aquila the Eagle, ripe for observing just after sunset and before ...

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

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