ISP 205: Visions of the Universe - Physics & Astronomy

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More detailed study of the Milky Way’s rotation reveals oneof the greatest mysteries in astronomy – dark matter:the stars in the disk of the galaxy represent only the “tip of theiceberg” compared to the mass of the entire galaxy.Most of the galaxy’s mass lies above and below the diskIn the “dark” halo!© 2005 Pearson Education Inc.,publishing as Addison-Wesley
Within the Local Group galaxies moves randomly, forexample, Milky way moves toward Andromeda withthe speed of 300,000 km/hr.When we look outside the Local Group we find outastonishing fact…© 2005 Pearson Education Inc.,publishing as Addison-Wesley
Page 5 and 6: The Earth: our planet. Solar system
Page 7 and 8: PlanetMarsNeptuneA moderately large
Page 9 and 10: AsteroidA relatively smalland rocky
Page 11 and 12: Solar (Star) SystemA star and allth
Page 13 and 14: GalaxyA great island of stars in sp
Page 15 and 16: 2) How did we come to be?Big bang a
Page 17 and 18: 3) How can we know what the univers
Page 19 and 20: Example:This photo shows the Androm
Page 21 and 22: Question: Why can’t we see a gala
Page 23 and 24: What have we learned?• How did we
Page 25 and 26: 1.2 The Scale of the UniverseOur go
Page 27 and 28: Let’s reduce the size of the sola
Page 29 and 30: How far away are the stars?On our 1
Page 31 and 32: How big is the Milky Way Galaxy?The
Page 33 and 34: Suppose you tried to count the more
Page 35 and 36: • Now let’s step through the Un
Page 37 and 38: January 1st: Big Bang.February: Mil
Page 39 and 40: What have we learned?• How big is
Page 41 and 42: How is Earth moving in our solar sy
Page 43: Our Sun moves randomly relative to
Page 47 and 48: Are we ever sitting still?Question:
Page 49 and 50: What have we learned?© 2005 Pearso
Page 51: What have we learned?• Are we eve

ISP 205: Visions of the Universe - Physics & Astronomy

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