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Everything that happens on the International Space Station revolves around one thing: Earth, sixteen times a day! So for Earth Day 2021, NASA offers a gift you can’t get anywhere else with this leisurely view of our home planet, from 250 miles up, rendered in extraordinary ultra-high definition video. Hit play, relax and enjoy. This 4K footage was recorded between 2019 and 2020.

We don’t yet know what the James Webb Space Telescope will uncover. Will we get answers? Will we have more questions? One thing’s certain: The story of us is a never-ending quest for knowledge.

Voice actor Peter Cullen, known for bringing to film and television numerous characters including Optimus Prime of "Transformers", Disney's Eeyore and many more, describes NASA's next generation space telescope.

This video uses data gathered from the Lunar Reconnaissance Orbiter spacecraft to recreate some of the stunning views of the Moon that the Apollo 13 astronauts saw on their perilous journey around the farside in 1970. These visualizations, in 4K resolution, depict many different views of the lunar surface, starting with earthset and sunrise and concluding with the time Apollo 13 reestablished radio contact with Mission Control. Also depicted is the path of the free return trajectory around the Moon, and a continuous view of the Moon throughout that path. All views have been sped up for timing purposes — they are not shown in "real-time."

Join us for a fly-through of the International Space Station. Produced by Harmonic exclusively for NASA TV UHD, the footage was shot in Ultra High Definition (4K) using a fisheye lens for extreme focus and depth of field.

Galaxies are the visible foundation of the universe; each one a collection of stars, planets, gas, dust, and dark matter held together by gravity. Hubble’s observations give us insight into how galaxies form, grow, and evolve through time. Hubble’s namesake, astronomer Edwin Hubble, pioneered the study of galaxies based simply on their appearance. He divided galaxies into three basic forms: This “Field Guide” will quickly teach you those three basic forms, and some new ones that astronomers have added over the years!

This 4K visualization shows the Moon's phase and libration at hourly intervals throughout 2022, as viewed from the Southern Hemisphere. Each frame represents one hour. In addition, this visualization shows the Moon's orbit position, sub-Earth and subsolar points, and distance from the Earth at true scale. Craters near the terminator are labeled, as are Apollo landing sites, maria, and other albedo features in sunlight.

Boötes void is one of the largest known voids in the Universe. This massive empty spherical region in space is about 330 million light-years in diameter.

They combine more than 10 years of NEOWISE observations and 18 all-sky images, enabling a long-term analysis and a deeper understanding of the universe.

Paul Smith is a night-sky fanatic and photographer. His obsession is sprites: immense jolts of light that flicker high above thunderstorms. Last October, he guided NASA scientist Dr. Burcu Kosar through the backroads of Oklahoma to catch one herself. Although she’d studied sprites for more than 15 years, she hadn’t yet chased one. #nasa #semanasanta #space