Lecture 2
Download
1 / 14

Astronomy Today - PowerPoint PPT Presentation


  • 604 Views
  • Updated On :

Lecture 2 Astronomy Today. 1 nanosecond = 1 ft. (1/1,000,000,000 second ). Light Speed = 299,792,458 meters/second. Using Light to Measure Distance. Earth to Moon = 1.28 light seconds. Light Speed = 299,792,458 meters/second. Using Light to Measure Distance.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Astronomy Today' - johana


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Lecture 2

Astronomy

Today


1 nanosecond = 1 ft

(1/1,000,000,000 second)

Light Speed = 299,792,458 meters/second

Using Light to Measure Distance


Earth to Moon = 1.28 light seconds

Light Speed = 299,792,458 meters/second

Using Light to Measure Distance


Sun to Earth = 8.33 light minutes

Light Speed = 299,792,458 meters/second

Using Light to Measure Distance

1 AU

(Astronomical Unit) =8.33 light minutes


Sun to nearest star = 4.23 light years

Light Speed = 299,792,458 meters/second

Using Light to Measure Distance


1 AU

1 arc second = 1/3600 degree

1 pc

Astronomers and Cosmologists use Parsecs

A More

Professional

Unit of

Distance

1 pc = 3.26 ly

1 parsec (pc)


Survey of

Astronomy

The

Milky Way

Eagle Nebula

North America

Nebula

Flaming Star

Nebula


The Milky Way

as seen by

Radio telescopes

The Milky Way

as mapped

by all types

of telescopes


The Entire

Milky Way

Galaxy


Large Magellanic Cloud

160,000 ly

Andromeda (M31) 2.5 ly

Small Magellanic Cloud

200,000 ly

Galaxies in the

Neighborhood

of the

Milky Way

Galaxy


Clusters of

Galaxies

Virgo Cluster - 53,000,000 ly


Galaxies

Deep in the

Universe

10,000,000,000 ly


Distribution

of Galaxies

Davison E. Soper, Institute of Theoretical Science, University of Oregon, Eugene OR


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


ad