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The Ship of the Imagination embarks on a journey through space and time to grasp how the autobiography of the Earth is written in its atoms, its oceans, its continents and all living things. Later, American geologist Marie Tharp creates the first true map of Earth's ocean floor, and discovers microscopic life that exists deep beneath the ocean.
S1E9 • Cosmos: A Spacetime Odyssey • Astronomy
In this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases.
#4 • Crash Course Astronomy • Astronomy
On a dry lakebed in Nevada, a group of friends build the first scale model of the solar system with complete planetary orbits: a true illustration of our place in the universe.
2015 • Astronomy
How do astronomers make sense out of the vastness of space? How do they study things so far away? Today Phil talks about distances, going back to early astronomy. Ancient Greeks were able to find the size of the Earth, and from that the distance to and the sizes of the Moon and Sun. Once the Earth/Sun distance was found, parallax was used to find the distance to nearby stars, and that was bootstrapped using brightness to determine the distances to much farther stars.
25 • Crash Course Astronomy • 2015 • Astronomy
Phil takes us for a closer (eye safe!) look at the two-octillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our planet.
#10 • Crash Course Astronomy • Astronomy
Sound can’t actually travel through a vacuum like space, but scientists have learned that there’s still plenty to hear.