Galaxies
Galaxies are a massive collection of stars and dark matter, ranging from a few million stars (dwarf galaxies) to hundreds of billions of stars (giant galaxies). Most galaxies are disk shaped and are tens of thousands of light years in diameter. Galaxies are categorized by three broad shapes - spiral galaxies, elliptical galaxies and peculiar galaxies. It is estimated that observable universe has more than 100 billion galaxies.
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| Presentations on Galaxies : |
Science Videos & Lessons: (Reviewed by K-12 teachers) A Universe Of Galaxies Grade: 2 - 12 Lesson on galaxies - Learn what galaxies are. 6:00 |
Galaxies, part 1 Grade: 2 - 12 Galaxies for kids - Learn about galaxies, our universe, and explore the fascinating science behind the galaxies. 7:00 |
Galaxies, part 2 Grade: 2 - 12 7:45 |
Galaxies, part 3 Grade: 2 - 12 8:00 |
Hubble Captures Colliding Galaxies Grade: 2 - 12 Take a look at Hubble Space Telescope's images of colliding galaxies as they illustrate different stages of the massively violent events. 1:35 |
Black Holes: Creation and Consumption of Galaxies Grade: 2 - 12 Learn about black holes, and their role in the creation and destruction of spiral galaxies. 3:40 |
Stunning Portrait of the Milky Way Galaxy Grade: 2 - 12 A video on our Milky Way galaxy. 3:10 |
Ride from Earth to Outside our Milky Way Galaxy Grade: 2 - 12 Take a quick and amazing spaceship ride from Earth out to the edge of our Milky Way galaxy! 1:40 |
Galaxies : A Cosmic Journey through the Universe Grade: 2 - 12 Take a cosmic journey through the universe. 5:35 |
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