EarthSky
Use Big Dipper to find North Star.

Use the Big Dipper to find the Little Dipper

Polaris – aka the North Star – marks the end of the Little Dipper’s handle. The 2 outer stars in the bowl of the Big Dipper always point to Polaris.

Glowing pink blob, scrabbly green lines, on a black background.

Is the Hyades star cluster being destroyed?

Data from ESA’s Gaia star-mapping satellite have revealed tantalizing evidence that the famous V-shaped Hyades – nearest star cluster to our sun – is being disrupted. The culprit may be a suspected population of dark matter sub-halos. Wow!

springtime-big-dipper-arcurus-spica.jpg

Follow the arc to Arcturus, drive a spike to Spica

If you only ever learn one star mnemonic, make it this one!

Striking new image of M106

This spectacular image features spiral galaxy Messier 106 and its diminutive neighbors, as well as a dense field of background galaxies and foreground stars.

57th anniversary of North America’s biggest earthquake

On Good Friday, March 27, 1964, south-central Alaska heaved under one of the most powerful earthquakes ever recorded, registering a 9.2 on the Richter scale.

Does a green sky predict a tornado?

Sometimes, before a tornado strikes, the sky turns an eerie green color. The answer to why the sky is blue will help you understand why the sky is sometimes green before bad weather.

A composite of phases of the moon.

Dates and times of moon phases in 2021

Find out when the next new moon, 1st quarter moon, full moon or last quarter moon will occur in 2021.

Torrential rains drench Hawaii

A strong tropical depression picking up moisture from the warm ocean caused widespread flooding in the Hawaiian islands.

Close-up of a calendar with the text March 15 in focus and a red pushpin sticking into it.

Beware the Ides of March? Why?

The Ides of March are March 15. We in modern times probably wouldn’t know about them – or know we’re supposed to beware of them – if it weren’t for William Shakespeare.

A streak of white, apparently exploding on the upper end, in a dark sky over trees.

Spectacular fireball display in UK leads to rare meteorite recovery

UK scientists and meteor experts have recovered pieces of a rare meteorite, just days after it entered Earth’s atmosphere and streaked across the sky. Researchers are ecstatic. “Normally we have to send spacecraft to collect bits of other worlds, but this time one has fallen right into our laps!” one said.