Solar eclipse: The amazing moment when the world first saw it
21 August 2017 Last updated at 19:15 BST
Millions of people across the US are enjoying one of the most incredible space sights that you can see from the Earth.
A total solar eclipse is sweeping across the States, plunging whole areas of the US into complete darkness for a few short moments.
Here is the moment when some of the first pictures of the total solar eclipse were seen from a special Nasa aircraft.
You can hear how excited everybody is!
For more updates from the Great American Eclipse 2017, click on this link.