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Editors of EarthSky
December birthstone: turquoise, zircon or tanzanite
The December birthstone is 1 of 3 gemstones, the exquisite blue-green turquoise, dazzling zircon, or the magnificent blue-violet tanzanite. Your choice!
December 1, 2023
Achernar is the End of the River of Eridanus constellation
Achernar is the 9th brightest star and flattest star known. It marks the end of Eridanus the River. Here's why much of Earth never sees it ... and how you can.
November 22, 2023
Meet Hamal, an ancient equinox star
Meet Hamal, the brightest star in Aries, and learn why people sometimes refer to the March equinox point as the First Point in Aries.
November 19, 2023
Almach, a quadruple star system in Andromeda
With the eye alone, Almach looks like a single star. Through a telescope, it looks like a colorful duo. But Almach is really 4 stars.
November 17, 2023
See Orion’s Belt as a celestial bridge between hemispheres
Many know Orion's Belt, a short straight row of 3 stars. To the Aymara, Orion's Belt is a Celestial Bridge between the sky's Northern and Southern Hemispheres.
November 15, 2023
Orion the Hunter is back in the evening sky
In November, the famous constellation Orion is back in the evening sky! Its most recognizable feature is its belt of 3 medium-bright stars.
November 14, 2023
See the Summer Triangle in northern autumn
Look west in the evening to see the Summer Triangle in northern autumn. Its 3 bright stars - Vega, Deneb, and Altair - are in 3 different constellations.
November 9, 2023
Halley’s Comet is Edmond Halley’s namesake. Happy birthday, Edmond!
Astronomer Edmond Halley is famous for predicting the return of the comet that we now know as Halley's Comet. Edmond was born on November 8, 1656.
November 8, 2023
Astronomy Essentials
Venus in the daytime: Best ways to see it
The moon is near Venus on November 9, 2023. That makes that morning a great time to try to spot Venus in the daytime sky. Read how here.
November 8, 2023
Jupiter as you’ve never seen it. Thanks, Hubble!
The giant planet Jupiter reached opposition this week, coming closest to Earth for the year. In celebration, NASA released this ultraviolet view of Jupiter.
November 3, 2023
