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RESOURCE	GRADE LEVEL	MEDIA TYPE
Astronomical Images in Different Wavelengths Visible light is just one portion of the electromagnetic spectrum that a telescope may detect. This collection of images produced for Teachers' Domain features radio wave, infrared, visible light, and X-ray images of distant stars and galaxies as well as images of the telescopes designed to detect the various wavelengths of radiation.	6-12	Interactive
How Big Is Our Universe? This interactive resource from Harvard Smithsonian Center for Astrophysics uses images and activities to understand the scope and scale of our universe. Featured are technologies used by generations of explorers.	3-12	Interactive
Infrared Search for Origins This interactive resource from NASA illustrates how infrared technology has advanced space exploration and can offer insight into questions about star formation, planetary systems, brown dwarfs, and the origins of the universe.	6-12	Interactive
Monster Black Hole in Galaxy M84 This animation by Thomas Goertel of the Space Telescope Science Institute is an artist's conception of a spiral galaxy harboring a super-massive black hole. Observe how the material rotates faster the closer it is to the nucleus.	6-12	Video
Spin a Spiral Galaxy This interactive activity from NOVA Online lets you spin a spiral galaxy, including our own Milky Way. It demonstrates that what you can learn from visible light observations of a galaxy is largely determined by the angle from which you are observing it.	6-12	Interactive
Stellar Velocity: The Doppler Effect This interactive activity from the NOVA Web site illustrates the Doppler effect and shows how it applies to measuring the direction and speed of stellar objects.	6-12	Interactive