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The Milky Way. The Milky Way Galaxy A broad, faintly glowing band stretching across the night sky.

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Presentation on theme: "The Milky Way. The Milky Way Galaxy A broad, faintly glowing band stretching across the night sky."— Presentation transcript:

1 The Milky Way

2 The Milky Way Galaxy A broad, faintly glowing band stretching across the night sky.

3 Composed of billions of stars in our galaxy too faint to be seen individually.

4 It’s invisible when the sky is lit up by artificial light or bright moonlight.

5

6

7 Galaxies

8 Galaxies are systems of stars, gas and dust They exist in a wide variety of shapes and sizes 4 basic types - elliptical, spiral, barred spiral, and irregular

9 Elliptical Galaxies About 60% of the galaxies Are round to oval in shape

10 Spiral galaxies have a central nucleus surrounded by a flattened disc with the stars, gas, and dust organized into a pattern of spiral arms. Greater concentration of stars near their centers

11 Barred Spiral Has a bar through the center with arms extending through the bar

12 Irregular Galaxy These galaxies have little symmetry in their structure About 10% of the galaxies


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