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Is there another Earth out there with liquid oceans, rocky continents and life like us? Astronomers seek the answer with spectroscopy, direct imaging and telescopes. They hope to find evidence of atmospheres, magnetospheres and signs of life.
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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.
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A young Carl Sagan realizes his childhood dreams, carrying his mentors' research forward.
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This first episode begins in 1957 and tracks the early years of the space race as the United States struggles to catch up with the Soviet Union. The episode reveals breathtaking failures and successes of the nascent American space program and demonstrates the stakes and costs of reaching the moon.
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Join Phil for a tour of our capital-M Moon, from surface features, inside to the core, and back in time to theories about its formation.
12 • Crash Course Astronomy • Astronomy
The most common vision of black holes is that they are monstrous and mysterious bodies swallowing everything around them. However, the latest discoveries are drawing a link between black holes and the existence of life.
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