1st Step: –Stars form from nebulas Regions of concentrated dust and gas –Gas and dust begin to collide, contract and heat up All due to gravity.
Ch. 9 – The Lives of Stars from Birth through Middle Age Second part The evolution of stars on the main sequence.
Hour 2: Stars, Stellar Evolution, and Creation of Chemical Elements The Sun & Nuclear Fusion - Energy for Life The Sun Compared With Other Stars Stellar.
Astronomy Unit Test Jeopardy Review Game. The SunLife Cycle of Stars GalaxiesMeasuring Matter Gravity and the Big Bang 100 200 300 400 500.
The Magnitude Scale A measure of the apparent brightness Logarithmic scale Notation: 1 m.4 (smaller brighter) Originally six groupings –1 st magnitude.
Astronomy Unit Review 1. Read the question 2. Write your answer on the white board 3. Write ONLY the answer.
The Lives of Stars Chapter 12. Life on Main-Sequence Zero-Age Main Sequence (ZAMS) –main sequence location where stars are born Bottom/left edge of main.
Ch. 9 The Lives of Stars from Birth through Middle Age The Cone Nebula.
Internal motions in star clusters Gordon Drukier Dept. of Astronomy, Yale University Yale Astrometry Workshop — 21 July 2005 Gordon Drukier Dept. of Astronomy,
Structure of the Universe Astronomy 315 Professor Lee Carkner Lecture 23.
Evolution of the Solar System Matt Rogers AT350 9 September 2003.
Properties of Stars II The Hurtzprung-Russell Diagram How long do stars live? Star clusters.