Astronomy 100 - Astronomy 100 Lecture notes Chapter 1 How are stars formed Interstellar gas dust = Incubator for new generation of stars They are

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

View Full Document Right Arrow Icon
Astronomy 100 Lecture notes Chapter 1 How are stars formed? Interstellar gas + dust = Incubator for new generation of stars They are held together by the force of gravity. Black Holes- The regions of space where matter is so dense that it can not radiate light. Constellation- Used by astronomers to describe an entire area of the sky and the objects in it. The celestial sphere (sky map) is divided into 88 constellations. Zenith- The highest point of the sky Nadir- The lowest point of the sky You can only see the sphere above the horizon. Meridian- The point stretch through zenith to the other level (semi-circle) Diurnal motions of stars- Daily motions of stars. The stars move from East to West every 24 hours because of the rotation of the Earth. This motion has nothing to do with the 3D space motions of stars. As the Moon orbits Earth it moves from west to east. Midnight- Full Moon
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 01/27/2012 for the course CHEM 121 taught by Professor 1212 during the Spring '11 term at University of Illinois at Urbana–Champaign.

Page1 / 2

Astronomy 100 - Astronomy 100 Lecture notes Chapter 1 How are stars formed Interstellar gas dust = Incubator for new generation of stars They are

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