2.22 Astro 1 Section 1 Professor Brandt

2.22 Astro 1 Section 1 Professor Brandt - Astro 1 Section 1...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Astro 1 Section 1 Professor Brandt Monday February 22nd 1999 Announcements: Lecture notes: Class 19. One issue to review from the test. The mass of a star does NOT greatly increase when it becomes a red giant. Mass represents amount of matter present and cannot change arbitrarily. You need to know this for the rest of the course. Constellations Canis Major - great dog. Contains Sirius but most other stars in this constellation are faint. The star Sirius called the dog star. It's the brightest star in the sky - 8.5 ly distant and 26 times as luminous as the sun. Canis Minor - little dog contains Procyon - yellow white. Only 10.5 ly away. 5 times as luminous as the Sun. Greek for "before the dog" Today the lecture is titled "People discover the Galaxy" In this lecture we will move out to larger size scales and will start talking about galaxies. Many of you have probably seen the Galaxy - go out at night in a rural place for a dark sky. The faint band of light running across the sky. Greeks and Romans called this the Milky Way. This band is actually made up of many stars and is part of our Galaxy. People had seen galaxies outside our own for a long time too but were not sure of their nature. For example the Andromeda Galaxy can just be seen by
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/20/2008 for the course ASTRO 1 taught by Professor Brandt during the Spring '99 term at Penn State.

Page1 / 3

2.22 Astro 1 Section 1 Professor Brandt - Astro 1 Section 1...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online