Astronomy

1
Lecture 2 Astronomy Today
2
Light Speed 299,792,458 meters/second
Using Light to Measure Distance
3
Light Speed 299,792,458 meters/second
Using Light to Measure Distance
4
Light Speed 299,792,458 meters/second
Using Light to Measure Distance
1 AU (Astronomical Unit) 8.33 light minutes
5
Light Speed 299,792,458 meters/second
Using Light to Measure Distance
6
Astronomers and Cosmologists use Parsecs
A More Professional Unit of Distance
1 pc 3.26 ly
1 parsec (pc)
7
Survey of Astronomy
The Milky Way
Eagle Nebula
Flaming Star Nebula
North America Nebula
8
The Milky Way as seen by Radio telescopes
The Milky Way as mapped by all types of telescopes
9
The Entire Milky Way Galaxy
10
Galaxies in the Neighborhood of the Milky
Way Galaxy
11
Clusters of Galaxies
Virgo Cluster - 53,000,000 ly
12
Galaxies Deep in the Universe
10,000,000,000 ly
13
Distribution of Galaxies
Davison E. Soper, Institute of Theoretical
Science, University of Oregon, Eugene OR
14
Schematic diagram showing the position of a
typical galaxy within the cosmic web
The Cosmic Web
R. A. Ibata et al., Science 319, 50 -52
(2008)
Published by AAAS