Galaxies

Stars are not scattered about haphazardly in space. They gather together into great spinning star islands, or galaxies. All the stars we see in the sky belong to to our home galaxies, which we call the Milky Way, or just the Galaxy. It is one of perhaps 100 billions of galaxies in the Universe. Each one contains billions of stars. Most galaxies lead relatively peaceful lives, giving out a steady output of light. Some, however, are noticeably more active. They pour out up to a million times more energy than normal, particularly as radio waves.
The Milky Way Spirals, ellipticals and irregulars
Active Galaxies Quasars
Clusters of galaxies

Click the following buttons to view the Galaxy Formation galaxies.mpg (2.4MB) require MPEG player or Get Free Media Player. galaxies.mov (8MB) require or Get Free Media Player.
Click the following buttons to view the HST/NICMOS image with superimposed diagram to identify the nucleus, the elongated disk and the jet. supernic.mov (5830KB) require or Get Free Media Player.
Click the following buttons to view the NICMOS Image Locations in WPFC Orion Mosaic Orion.mpg (2.5MB) require MPEG player or Get Free Media Player. Orion.mov (5.8MB) require or Get Free Media Player.
Click the following buttons to view the Orientation of SN1987A Rings Rings.mpg (1.3MB) require MPEG player or Get Free Media Player. Rings.mov (5.8MB) require or Get Free Media Player.
Click the following buttons to view the Beta Pictoris Warped Disk BetaPic.mpg (534KB) require MPEG player or Get Free Media Player.
Click the following buttons to view the Orion Nebula Animation OrionAnim.mpg (650KB) -- "Fly" into the Orion Nebula to see close-ups of protoplanetary disks viewed by the HST. require MPEG player or Get Free Media Player.

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