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Constellations and signs: What’s the difference?
What is the difference between the signs of the zodiac and the constellations of the zodiac? Astronomer Guy Ottewell illustrates and discusses this difference.
May 20, 2026
Happy May Day! Today is an astronomy holiday
Happy May Day! This annual celebration has its roots in astronomy as 1 of 4 cross-quarter days. Dancing around a maypole is a traditional May Day celebration.
May 1, 2026
Here’s how to see the Lunar X and V at 1st-quarter moon
Lunar X and Lunar V are optical features on the moon. They are visible through a telescope for several hours around the time of the 1st quarter moon.
April 23, 2026
Meet M13, the Great Globular Cluster in Hercules
Many stargazers call it the finest globular cluster in the northern half of the heavens. It's M13, also known as the Great Globular Cluster in Hercules.
April 21, 2026
New meteor shower from an asteroid being eroded by the sun
A new meteor shower has been linked to an asteroid that was broken up when it passed too close to the sun. Find out more here.
April 15, 2026
International Dark Sky Week is April 13 to 20
Celebrate dark night skies and limit light pollution by raising awareness with International Dark Sky Week, April 13 to 20, 2026. Find links here.
April 12, 2026
Looking for sky almanacs? EarthSky recommends …
Here are some almanacs that show you the rising and setting times for the sun, moon, planets and satellites in your sky.
April 10, 2026
Easter is April 5 and Orthodox Easter is April 12
In 2026, Easter falls on April 5. It falls on the first Sunday after the first full moon after the March equinox. More about the date of Easter, here.
April 3, 2026
Coma Berenices: See how Leo the Lion lost his tail
Coma Berenices is the constellation of Queen Berenice's Hair. It used to be the tail of Leo the Lion before it became its own constellation.
March 30, 2026
5 moon myths that still fool people today
There are plenty of myths that surround the moon. Here are 5 of the most popular. How many of these myths have you been led to believe?
March 27, 2026
