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Description
Until recently, astronomers had no smoking gun to identify the precise location and cause of gamma-ray bursts. Now they have assembled an abundance of clues pointing to two separate mechanisms: the collapse of a massive star, and the merging of two neutron stars—in each case creating a black hole.
3) Understanding the Universe: An Introduction to Astronomy, 2nd Edition: Episode 11More Eclipse Tales
Description
Solar eclipses also come in annular and hybrid varieties, reflecting the varying distance of the Moon from Earth. A famous total solar eclipse in 1919 provided observational evidence for Einstein's general theory of relativity.
18) Understanding the Universe: An Introduction to Astronomy, 2nd Edition: Episode 43Stars-Distant Suns
Description
A voyage to another star would require exact information on distances and properties of the stars. This lecture shows how astronomers measure the distance to nearby stars and how they determine their surface temperatures, which are the basis for stellar classification.
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