Chapter 10 Formation Of The Solar System1
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Chapter 10 Formation Of The Solar System1

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stars, galaxies etc.

stars, galaxies etc.

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    Chapter 10 Formation Of The Solar System1 Chapter 10 Formation Of The Solar System1 Presentation Transcript

    • Chapter 10 Formation of the Solar System Section 1 Galaxies
    • Measuring Distance in Space
      • A Light year is the length it takes to measure how far light travels in one year.
      • Light years were created it determine how far stars are from the Earth
    • Types of Galaxies
      • A galaxy is a large group of stars, dust, and gas.
      • Galaxies are classified according to their shape. Edwin Hubble developed the way to do this.
    • The Three Types Bulge in the center with spiral arms. Most galaxies are spiral. Spiral Other info Type of Galaxy
    • Spiral, con’t. The milky way is one New stars form on the spiral arms
    • Elliptical Mostly old stars Look like massive blobs of stars Elliptical
    • Irregular These galaxies are distorted b/c of other galaxies Irregular
    • What is in a Galaxy??
      • Huge clouds of gas and dust called Nebulas . A nebula has several jobs. Some might glow, others absorb light and hide other stars. Some reflect starlight.
    • Nebula cont’d
      • Spiral Galaxies usually have Nebula’s, they are good places to form new stars.
    • Star Clusters
      • Globular clusters :Groups of older stars.
      • They are found in a ball like halo surrounding spherical galaxies.
      • They are also found near giant elliptical galaxies.
    • Star clusters cont’d
      • Open Clusters : closely grouped stars usually located along the spiral disc of a galaxy.
    • Interstellar Medium
      • The material that is between a galaxy’s stars is called interstellar medium, (clouds of gas and dust).
      • Irregular and spiral galaxies have more interstellar medium than elliptical ones.
    • And then…..
      • Scientists look to other galaxies to learn about what early galaxies looked like.
      • Quasars, very powerful energy sources, may be caused by black holes