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EarthSky

Close-up on Cassiopeia the Queen

The constellation Cassiopeia the Queen has the distinct shape of a W or M. Find her in the north-northeast sky on September and October evenings.

Why were prehistoric insects so big?

Before the dinosaurs, giant insects ruled the world.

Great Square of Pegasus points to Andromeda galaxy

If your sky is dark, you’ll enjoy locating these stars and using this method of finding the Andromeda galaxy.

Surfer riding a rainbow

Photographer Josh Blash wrote: “I caught this surfer riding a rainbow after a storm moved off the New Hampshire coast last Wednesday.”

Orion and Sirius the Dog Star

A sign of the changing season, Sirius – the sky’s brightest star – is visible before sunup. You’ll know it’s Sirius if the very noticeable 3 stars in Orion’s Belt point to it.

Today in science: A moon for Mars

American astronomer Asaph Hall discovered Phobos, 1 of the 2 known Martian moons, on this date in 1877.

How to see a full circle rainbow

It’s possible to see the whole circle of a rainbow – but sky conditions have to be just right. Plus you have to be up high!

Amazing Kilauea volcano imagery you might have missed

For more than 2 months, lava has been pouring from Hawaii’s Kilauea volcano, destroying homes and remaking the land. A compilation of photos and videos, here.

See the constellation Scutum the Shield

Scutum has only has 4 stars that make up the constellation outline, but it’s noticeable in a dark sky because a rich region of the Milky Way is behind it.

Heads up! It’s a month of eclipses

Partial solar eclipse July 13. Total lunar eclipse July 27. Partial solar eclipse August 11.