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All About Astronomy
|Our Solar System||Stars||Glossary||Printables, Worksheets, and Activities|
|The Sun||The Planets||The Moon||Asteroids||Kuiper Belt||Comets||Meteors||Astronomers|
|Lifecycle||Nuclear Fusion||Brightest Stars||Galaxies||Other Solar Systems||Constellations||Why Stars Twinkle|
|Birth||Death||Star Types||Closest Stars||Nebulae||Major Stars||The Zodiac||Activities, Links|
|Spiral Galaxies||Elliptical Galaxies||Irregular Galaxies||Lenticular Galaxies||Active Galaxies||Clusters of Galaxies|
There are three major types of galaxies: spiral (with arms), elliptical (no arm), and irregular (without rotational symmetry). Galaxies radiate a continuous spectrum of energy. Some radiate radio waves, X rays, and infrared, and ultraviolet (UV) radiation.
The Earth, Sun and the rest of our solar system are a tiny part of the Milky Way Galaxy, a spiral galaxy.
The Milky way Galaxy is just one galaxy in a group of galaxies called the Local Group. Within the Local Group, the Milky Way Galaxy is moving about 300 km/sec (towards the constellation Virgo).
The galaxy that is nearest to our galaxy is the Sagittarius Dwarf galaxy, which is about 24 kiloparsecs or 80,000 light years from us. The Large Magellanic Cloud is another close galaxy; it is about 50 kiloparsecs from us.
Make a galaxy of stars from glitter or sand on black paper
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