Sometimes it Rains on the Sun

(Updated post from 2013) The Sun is awesome. I mean, never mind that it contains 99% of all the mass in the Solar System, that it supplies our planet with the energy needed to sustain life, that its constantly-blowing solar wind helps keep some of those nasty cosmic particles out of the planetary neighborhood, and…

June 3, 1965: NASA’s First Spacewalk

Today marks the the anniversary of America’s first spacewalk, performed by NASA astronaut Edward H. White II on the afternoon of June 3, 1965 during the four-day Gemini IV mission. In NASA terminology spacewalks are also referred to as extravehicular activities, or “EVAs” – basically anything performed by a person in space outside a spacecraft. The…

It’s Cassini’s Final Month.

Yes, it’s true. As of today, August 15, NASA’s Cassini spacecraft has less than 31 days—one full month—left in operation and, sadly, its existence. On September 15, 2017, Cassini will end its mission with a controlled dive into Saturn’s atmosphere…a journey that it will not long survive. But up until the very end Cassini, which…

This Day in Space History: One Small Step

Note: This is an updated article from 2012. “That’s one small step for a man… one giant leap for mankind.” I’m not sure what else need be said about the significance of what happened on this day in 1969 other than it was a shining moment in human history, and will be — should be…

Watch Ed White Perform the First American Spacewalk, 52 Years Ago Today

Today is the the 52nd anniversary of America’s first spacewalk, performed by NASA astronaut Edward H. White II on the afternoon of June 3, 1965 during the four-day Gemini IV mission. In NASA terminology spacewalks are also referred to as extravehicular activities, or EVAs—basically anything done outside the protection of a spacecraft. The video above shows footage…

Cute Science Video Alert: The Story of Stars

Like people, stars are found in all colors and sizes. They can range from small, sassy red dwarfs to giant blue beasts. In fact there are seven main types of stars, grouped by their apparent colors (and thus temperatures) and classified as O, B, A, F, G, K, or M in order of hottest to coolest. (Learn more about…

Get Ready for Cassini’s Glorious Grand Finale

The end is near. On September 15, 2017, NASA’s Cassini spacecraft will end its mission as well as its very existence with a plunge into the atmosphere of the very planet it has been orbiting since June 2004. It’s a maneuver intended to protect the pristine environments of Saturn’s icy moons, some of which harbor…

The Chirp Heard Round the World: How Scientists Confirmed the LIGO Detection

It’s been a year since researchers with the Laser Interferometer Gravitational-wave Observatory (LIGO) announced the first direct observations of gravitational waves, the oscillations in the fabric of space and time created by powerful cosmic events—like the merging of two massive black holes. This cosmic phenomenon was first predicted by Einstein in 1915, but it took a century…

Here’s What It Would Look Like to Land on Pluto’s Heart

What would it look like to approach Pluto for a landing? Perhaps some day in the future a robotic mission will do exactly that and we’ll know for sure, but for now we have to use our imaginations…luckily we do have some incredible images of Pluto to help with the details, thanks to NASA’s New…

Friday Fun: Plop Plop, Fizz Fizz…in Zero-G

During his 340-day-long One-Year Mission in 2015-2016 NASA astronaut Scott Kelly conducted—and was the subject of—countless experiments on the effects of long-duration space travel aboard the ISS. But he did manage to have a little fun too; the video above shows what happens to a blob of water free-floating in microgravity (that’s the technical term for…

Seeds in the Cosmic Wind: Carl Sagan on Space Exploration

Got the Monday back-to-work blues? Upset by bad news headlines? Concerned about a potential future President Trump? Take a couple of minutes and watch this. This video, published by The Royal Institution on YouTube in Dec. 2015 and shared again on Twitter today, features an adorable animation about spaceflight with narration taken from a lecture given by Carl…