Ever wonder how our planet got here? It was born in a cosmic storm. The violence could have destroyed us, but instead it made us. Astronaut host – Nicole Stott.
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After 665 weightless days in space, NASA's most experienced astronaut, Peggy Whitson, smashes through the atmosphere on her last journey home to planet Earth. With unprecedented filming on board the ISS during Peggy's final mission and with the support of our other featured astronauts, we reveal how their time in space transforms their understanding of our planet's wonders, insights that will change our perspective, too. There is no place like home. Or is there? Just how strange is our rock, and is it really unique in the universe? Astronaut host – Peggy Whitson.
2018 • Astronomy
While Jupiter is nowhere near massive enough to initiate fusion in its core, there are even more massive objects out there that fall just short of that achievement as well called brown dwarfs. Brown dwarfs, have a mass that places them between giant planets and small stars. They were only recently discovered in the 1990’s, but thousands are now known. More massive ones can fuse deuterium, and even lithium, but not hydrogen, distinguishing them from “normal” stars. Sort of.
28 • Crash Course Astronomy • 2015 • Astronomy
Determining the age of the universe continues to be an elusive endeavor for scientists as their results are conflicting. Without a definitive answer, everything known about the cosmos could be completely wrong.
S10E5 • How the Universe Works • 2021 • Astronomy
The Known Universe takes viewers from the Himalayas through our atmosphere and the inky black of space to the afterglow of the Big Bang. Every star, planet, and quasar seen in the film is possible because of the world's most complete four-dimensional map of the universe, the Digital Universe Atlas that is maintained and updated by astrophysicists at the American Museum of Natural History.
Today we are talking about the life -- and death -- of stars. Low mass stars live a long time, fusing all their hydrogen into helium over a trillion years. More massive stars like the Sun live shorter lives. They fuse hydrogen into helium, and eventually helium into carbon (and also some oxygen and neon). When this happens they expand, get brighter, and cool off, becoming red giants. They lose most of their mass, exposing their cores, and then cool off over many billions of years.
29 • Crash Course Astronomy • 2015 • Astronomy
Following engineers and scientists on a groundbreaking mission as they build, test and launch the James Webb Space Telescope, the most powerful observatory ever constructed, and discovers the astonishing cosmological mysteries it will investigate.
2021 • Astronomy
Earth's journey through the universe is a perilous one, and new discoveries reveal that our planet is heading toward a mysterious area of the cosmos that could eject us out of the Milky Way and into oblivion.
S8E9 • How the Universe Works • 2020 • Astronomy