NASA

For the Benefit of All | NASA Glenn Research Center Vital to advancing NASA missions—we are Glenn Research Center. A hub for ingenuity, where every day the best minds in the nation are keenly focused on designing game-changing technology that enables further exploration of the universe and revolutionizes air travel. We never close—we explore and discover for the benefit of all. (music only)

Post-Flight News Conference with Kate Rubins - April 21, 2021 Expedition 64 Flight Engineer Kate Rubins speaks with media from Johnson Space Center.

Inside Mission Control with Gene Kranz Flight director and NASA legen Gene kranz reflects on the historic Apollo 11 mission to the moon.

Ancient Aliens: EVIDENCE OF LOST CIVILIZATIONS ON MARS (Season 14) | History Watch new episodes of Ancient Aliens Saturdays at 9/8c, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. While going through satellite images of Mars, researchers spotted the profile of a Badlands Guardian. Theorists believe that the culture that created this impossible Martian structure could be directly connected to the human race, in this clip from Season 14, "The Badlands Guardian." #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full episodes on our site: https://histv.co/AncientAliens Check out exclusive HISTORY content: H...

| Interstellar travel | Space documentary 2020 | Interstellar travel is crewed or uncrewed travel between stars or planetary systems. Interstellar travel would be much more difficult than interplanetary spaceflight. Whereas the distances between the planets in the Solar System are less than 30 astronomical units (AU), the distances between stars are typically hundreds of thousands of AU, and usually expressed in light-years. Because of the vastness of those distances, practical interstellar travel based on known physics would need to occur at a high percentage of the speed of light, allowing for significant travel times, at least decades to perhaps millennia or longer. The speeds required for interstellar travel in a human lifetime far exceed what current methods o...