Galaxies
How The Universe Works-Galaxies
Students completed a viewing guide on galaxies
How the Universe Works - Galaxies (part 1 of 3) How the Universe Works - Galaxies (part 2 of 3) How the Universe Works - Galaxies (part 3 of 3) |
In this episode scientists talk about the estimated 200 billion galaxies in the known Universe and explains where galaxies came from, how they work, what's their future and how they will die.
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Galaxy Types
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Hubble Deep Field--One of the most important images in astronomy.
This image is the combined total of over 2000 separate images, and the total exposure is a whopping two million seconds, or 23 days! It’s based on the original Hubble Ultra Deep Field, with new observations added in since the originals were done. It shows over 5500 galaxies – nearly everything you see in the picture is a galaxy, an island universe of billions of stars. Only a handful of individual stars in the foreground of our own galaxy can be seen.
Quasars
Dark Matter
Galactic Smash Up
New Hubble observations indicate that our galaxy, the Milky Way, will physically collide and merge with the Andromeda galaxy... in about 4 billion years. This simulation shows how we think this event will unfold, taking about 2 billion years for the two to merge.
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Galactic Address Images
The Milky Way
Stretching across the dark night sky, not easily visible when the Moon is in the sky, is a faint irregular glowing strip of light. For thousands of years peoples of various cultures tried to explain what they saw, sometimes using stories. Here are some examples: Chinese The seventh Princess of Heaven fell in love with a poor herdsman and ran away to marry him. When her mother sent soldiers to bring her home, the herdsman chased them away. Seeing her daughter’s husband running, the mother dropped a silver pin to make a silver stream to separate the lovers forever. Eventually, her father allowed her to have an annual reunion with her husband — black birds escorted her across the stream. The Milky Way is that silver stream. The young lovers are the stars Vega and Altair on either side of it. Navajo When the world was created, the people gathered around Black God to place stars in the sky. Coyote was frustrated by how long it was taking. He threw the bag of stars over his head, forming the Milky Way. Egyptian The goddess Isis spread large quantities of wheat across the sky. We see this bounty as the Milky Way. African Bushmen The Milky Way is made of the ashes of campfires. Polynesian The Milky Way is a long, blue, cloud-eating shark. Greek The Milky Way is along the circular path where the Sun once moved across the sky. It looks different than the rest of the sky because the Sun scorched it. |
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