Enjoying EarthSky? Subscribe.

145,432 subscribers and counting ...


What happens underground when a meteor hits

When a missile or meteor strikes the earth, the havoc above ground is obvious, but the details of what happens below ground are harder to see. Duke University physicists have developed techniques that enable them to simulate high-speed impacts in artificial soil and sand in the lab, and then watch what happens underground close-up, in super slow motion.

Sperm whale meets deep-sea vehicle

Nautilus Live yesterday posted this wonderful video of the capture of a sperm whale by the ROV Hercules. The ROV – remotely operated underwater vehicle – was tethered 598 meters (1,962 ft) below the Gulf of Mexico off the coast of Louisiana at the time.


The SpaceX Dragon capsule – carrying supplies and other cargo – is now on its way to the International Space Station. Rendezvous will take place Friday morning.

NASA scientist: We’ll find signs of alien life by 2025

“We know where to look. We know how to look,” said NASA chief scientist Ellen Stofan.

How good is your eyesight? Take this test.

Who do you see? Take a couple of minutes to have some fun. Video from the guys at AsapSCIENCE.

The python that’s eating Florida

Burmese pythons were imported to Florida as pets. Now tens of thousands of them are in the wild and they’re eating everything. Check out this video from the New York Times. Yikes!

Auroras in motion

Northern Lights from Sergio Garcia Rill on Vimeo.

Take 3 minutes to watch this green and ghostly time-lapse video of the Alaskan northern lights. It was made from 4,450 photos by our friend Sergio Garcia Rill

Like coastlines? You’ll like this video

If you like science, and you like spending a day along a coastline – and if you live in the Pacific Northwest or Alaska – this citizen science project might be for you. It’s called COASST, and it’s a group of scientists and volunteers who monitor beach-cast seabird carcasses to learn more about bird populations in their local ecosystems.

Video: What is a pulsar?

A pulsar is a rapidly spinning neutron star which is the small, incredibly dense remnant of much more massive star. How dense? A teaspoon of matter from a neutron star weighs as much as Mount Everest.

First one-year ISS crew to launch Friday

Photo credit: NASA

Photo credit: NASA

The goal of the mission is to find out how the human body responds to a prolonged stay in space. Watch the launch and watch the arrival.