This rare footage shows NASA testing the X-43A, an experimental hypersonic aircraft built to explore extreme-speed flight. Because scramjet engines cannot start from rest, the vehicle was carried under a B-52, boosted to hypersonic speed by a rocket, and only then ignited its own engine. | SpaceEve

47K views · 3.9K reactions | Experience the International Space Station like never before in this new 4K Ultra High Def video taken from the orbiting laboratory 250 miles above Earth and orbiting at 17,500 mph. Watch a teaser below and see the full video here: https://youtu.be/ouv1Un1F36A | NASA - National Aeronautics and Space Administration | Facebook

96K views · 3.1K reactions | There it goes! Thirteen photographs assembled in sequence show the International Space Station, with a crew of three onboard, pass in front of our view of the Sun while orbiting Earth at a speed of roughly five miles per second on Sunday, Oct. 7. See more: https://www.flickr.com/photos/nasahqphoto/sets/72157674303910028/ Learn when you can #SpotTheStation: https://spotthestation.nasa.gov/ | NASA - National Aeronautics and Space Administration | Facebook

The International Space Station is your orbiting laboratory, and the science being conducted there will help us push farther into deep space, while providing benefits back on Earth. Microgravity unlocks new worlds of discovery. Dive into what we're learning: http://www.nasa.gov/iss-science 🔬🚀 | NASA - National Aeronautics and Space Administration