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Sound can’t actually travel through a vacuum like space, but scientists have learned that there’s still plenty to hear.
Meet Perseverance, NASA's latest rover, as it heads to Mars to answer one question: did life exist on the red planet? On the way, it will lay the foundation for human exploration of our closest neighbour.
S4E5 • Breakthrough • 2021 • 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 Orion Nebula is a interstellar cloud situated in the Milky Way, south of Orion's Belt. In a 2-year effort, scientists create a mosaic of over 100 images at the tip of Orion's sword to discover four massive young stars. What do they tell us about how planetary systems are formed?
18 • Cosmic Front • 2014 • Astronomy
We reveal the planetary enigmas on our doorstep and embark on the New Horizons voyage to photograph Pluto. Will our encounter with this tiny ball of ice and rock and the trillions of icy objects beyond it paint a clearer picture of how the planets came to be?
1/8 • The Planets • 2004 • Astronomy
Today on Crash Course Astronomy, Phil explains comets. Comets are chunks of ice and rock that orbit the Sun. When they get near the Sun the ice turns into gas, forming the long tail, and also releases dust that forms a different tail. We’ve visited comets up close and found them to be lumpy, with vents in the surface that release the gas as ice sublimates. Eons ago, comets (and asteroids) may have brought a lot of water to Earth -- as well as the ingredients for life.
21 • Crash Course Astronomy • 2015 • Astronomy