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Posts by EarthSky

Brown recluse spider. The photo shows its size in relation to a quarter. – Photo courtesy of K-State Research and Extension
Science Wire | Apr 25, 2016

10 things to know about brown recluse spiders

It’s their active season. Here are 10 things to know about these venomous spiders that like to live where we do.

View larger. |  The Bubble Nebula, also known as NGC 7653, is an emission nebula located 11,000 light-years away. Image credit: NASA, ESA, Hubble Heritage Team
Science Wire | Apr 23, 2016

Bubble Nebula looks like giant cosmic soap bubble

A new Hubble image captures – in stunning clarity – the Bubble Nebula, a cloud of gas and dust illuminated by the brilliant star within it.

Image via Neha Golwala
Science Wire | Apr 22, 2016

Photos from friends: Favorite images of Earth

In celebration of Earth Day 2016, we’ve brought together some of our favorite images of Earth by the EarthSky community. Thank you all!

The radiant point for the yearly Lyrid meteor shower is near Vega, brightest star in the constellation Lyra the Harp.
Tonight | Apr 20, 2016

Vega marks Lyrid meteor radiant point

The maximum number of Lyrid meteors may rain down during the predawn hours on April 22, 2016. But the moon will be in the way.

Photo Credit: wili hybrid
Science Wire | Apr 15, 2016

What gives rainbows their curved shape?

A rainbow isn’t a flat two-dimensional image on the dome of sky. It’s more like a mosaic, composed of many separate bits … in three dimensions.

Photo via Eric Rolph at Wikimedia Commons
Science Wire | Apr 15, 2016

How to see a whole 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!

Airplane glory via Brocken Inaglory at Wikipedia
FAQs | Apr 12, 2016

What is a glory?

People traveling in airplanes often see glories. The sun has to be behind your head. You’ll see the plane’s shadow cast on a cloud, surrounded by a halo of light.

Photo credit: Robbo-Man
Science Wire | Apr 08, 2016

What is earthshine?

That glow over the unlit part of a crescent moon – called earthshine – is light reflected from Earth.

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Tonight | Apr 03, 2016

Big Dipper to Polaris and Little Dipper

The two outer stars in the bowl of the Big Dipper always point to Polaris, which marks the end of the Little Dipper’s handle.

Extend the handle of the Big Dipper to find the star Arcturus and the star Spica. Spica is found in the southeast sky at nightfall, and then climbs to its highest point for the night around midnight.
Tonight | Apr 02, 2016

Extend Big Dipper’s handle to Spica

Use the Big Dipper to arc to the star Arcturus. Then drive a spike to the star Spica on these springtime evenings!