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Sun news UPDATE: Double Bam! The sun releases a 2nd X flare

Sun news February 21, 2024. UPDATE: BAM! X Flare! The huge active region AR3590 blasted an X1.8 flare at 23:07 UTC on February 21. Read more.

C. Alex Young

Raúl Cortés

Armando Caussade

February 22, 2024

Meet Pollux: The brighter twin star of Gemini

Pollux, the brightest star in the constellation Gemini, blazes in a golden light next to its bluish-white heavenly twin, Castor.

Editors of EarthSky

February 20, 2024

Castor is 6 stars in one

The bright blue-white star Castor, in the constellation Gemini, appears to our eyes as a single star. But it’s really a family of 6 stars.

Editors of EarthSky

February 20, 2024

Can you see Canopus, the 2nd-brightest star?

Here's how to spot Canopus, the 2nd-brightest star in the sky as seen from Earth, on February evenings. It’s located far south on the sky’s dome.

Deborah Byrd

Larry Sessions

February 18, 2024

Mizar and Alcor in the bend of the Big Dipper

Mizar and Alcor are a famous pair of stars located at the bend of the handle of the Big Dipper. Can you see both without using binoculars?

Bruce McClure

February 11, 2024

See Sirius, the brightest star in the night sky

Spot Sirius in Canis Major the Greater Dog - the brightest star as seen from Earth. Learn the science and mythology of Sirius the Dog Star.

Deborah Byrd

February 2, 2024

Elnath is a bright star close to the galactic anticenter

The galactic anticenter is opposite the Milky Way's center from our viewpoint on Earth. The closest bright star to the anticenter is Taurus the Bull's Elnath.

Bruce McClure

January 15, 2024

Bright Procyon: The Little Dog Star in Canis Minor

The Dog Star, Sirius, is easy to spot because it's the sky's brightest star. Procyon - the other Dog Star - is near its brighter brother on the sky's dome.

Larry Sessions

January 10, 2024

Blue-white Rigel is Orion’s brightest star

Blue-white Rigel shines as the brightest star in the constellation Orion the Hunter. It's a hot massive star in the latter stages of its stellar evolution.

Larry Sessions

January 4, 2024