Mare Crisium, or the 'Sea of Crises', can be spotted on the night of May 30 as an oval-shaped dark patch on the moon's northeastern limb, close to the terminator — the line that separates day from ...

Look for them around 10 p.m. local daylight time, roughly one-quarter up in the western sky. In addition to their closeness ...

Summer arrives for northern observers as the Moon visits Venus, Uranus, and Mercury. Plus: globular cluster M15, double star ...

June offers a celestial spectacle, starting with the Milky Way's rise in dark skies. Venus shines brightly in the early ...

Mercury now shines at magnitude 0 in Gemini and is visible in the western sky for about an hour and a half after sunset. The ...

By June 24, Mercury has dipped to magnitude 0 and lies in line with Castor and Pollux ... Earth, or just 1′ across. Yet it would still attain a brilliance 500 times that of the Full Moon.

A new book shows that the Northern Dene people of Alaska and Canada have known far more about the stars than an earlier ...

Afterward, from the 26th through the 30th, we will again see a Waxing Crescent Moon in our evening skies. See the Moon line up with Mercury and the bright stars Pollux and Castor just after sunset ...

Castor shines less brightly than Pollux. After the event, the crescent moon will continue to grow. It will reach its first quarter phase by June 2. At that time, half the moon will be visible from ...

Behind the astrology memes, tarot TikToks, and full-moon rituals is an entire symbolic ... representing duality and the mythological twins Castor and Pollux. Geminis are ruled by Mercury, the ...