Galaxies through Space and Time
Galaxies through Space and Time2ContentsINTRODUCTION 4About the Hubble Space Telescope 5Our Understanding of Galaxies : A Timeline 7CHAPTER 1: Our Galactic Neighborhood 10Seeking the Source of Falling Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12Studying Ancient Stars in the Milky Way . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Tracing the Origin of an Intergalactic Cloud.
in the history of astronomy. Hubble observes the universe from Earth orbit, just outside our planet’s atmosphere. Credit: NASA As NASA’s first Great Observatory and the first major optical telescope in space, Hubble ushered in a new era of precision astronomy. The heart of the telescope is its 94.5-inch-diameter primary mirror. It is the ...
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