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NASA Goddard Profile picture
@NASAGoddard
Nov 24, 2017 • 13 tweets • 7 min read • Read on X
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THREAD: Need a break from #BlackFriday, digging @NASA’s #BlackHoleFriday? Perfect, enjoy our Black Hole 101! ☄️
First the basics. A black hole is a region in space where the pulling force of gravity is so strong that light is not able to escape. Because of this, black holes are invisible. Only telescopes with special instruments can help find them.

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More from @NASAGoddard

NASA Goddard Profile picture
Oct 1, 2018
Happy Birthday #NASA. 60 has never looked better!🎉🎂

From the beginning, Goddard has worked to support our agency’s work of uncovering the universe 🌃.

Here are a few ways Goddard has helped along the way. #NASA60th
It started with Dr. Robert Goddard! In 1926, he successfully tested the first rocket using liquid fuel 🚀🚀. Today he’s known as the “Father of Modern Rocketry.” #NASA60th
go.nasa.gov/2y5sAam
To honor his discovery, the Goddard Space Flight Center was named after him. Our campus became #NASA’s first space flight center in 1959. #NASA60th
Read 23 tweets
NASA Goddard Profile picture
Nov 3, 2017
Lasers. In. Space.
NASA’s got ‘em! Next year we launch a satellite with lasers, @NASA_ICESat2, to measure Earth’s changing ice #NASASocial
To measure the height of ice, ICESat-2’s instrument ATLAS will send laser light to Earth, and time how long it takes to get back
The satellite will send 10,000 laser pulses EVERY SECOND to Earth. 1 pulse = 300 trillion photons. That’s trillion with a 'T.'
Read 11 tweets

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