When Your Little Sister Discovers And Sends You The Classic Science Nerd Posts

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Astronomy Photo of the Day: 11/23/15 - The Plieades

November is the month of the Pleiades. When the leaves turn orange and begin to fall in the North, look to the skies, and you will see the Seven Sisters.

Ultimately, the ‘Seven Sisters’ is the common name given to this open star cluster. It stems from the fact that, although the region is dominated by a number of middleaged stars, most nights, only 6 or 7 are bright enough to see.

In fact, the Pleiades contains over 3000 stars.

The cluster is located in the constellation Taurus. It’s is one of the nearest star clusters to Earth and is also the cluster most obvious to the naked eye in the night sky.

Image credit: Marco Lorenzi http://www.glitteringlights.com

HOW DID I NOT KNOW THIS?!

Alexander Pohl

7 Technologies Super Soldiers Will Be Using in Future Warfare

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Video Explaining Orbital Mechanics

Almost a month ago, the spaceflight company Blue Origin sent a rocket up to the edge of space and then guided it gracefully back down to earth, intact. It was a historic first.

But Blue Origin’s major competitor, SpaceX, was quick to point out that the rocket wasn’t going fast enough (or sideways enough) to place a satellite into orbit - just 4,600 kph (~2,860 mph). It went straight up, and then straight down.

Now, SpaceX has managed to put 11 satellites in orbit with a “reusable” rocket. Their rocket didn’t just go up and down - it reached a horizontal velocity of 6,000 kph (3,600 mph) before returning to earth. If SpaceX is able to refurbish the rocket and use it in another launch, they’ll have figured out a way to dramatically reduce the cost of spaceflight.

Here’s the full webcast. And here’s the full story.

Video credit: SpaceX