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CHALLENGE #10: First, explore the night sky with the MicroObservatory telescopes. Then use the World Wide Web to find an image of the SAME region of the sky, taken with a telescope that can detect wavelengths of light beyond the visible -- such as infrared, ultraviolet, or x-rays. The example below shows the Universe in a whole new light!
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At left is a MicroObservatory image of the galaxy NGC2300 (faint smudge) and two neighboring galaxies. At right is the same region of the sky, seen with a telescope that detects x-rays. The glowing region, colorized purple, is an enormous cloud of gas so hot that it emits x-rays. The cloud is so large that it encompasses the three galaxies! The gas is invisible in MicroObservatory, but visible to x-ray telescopes. The galaxies probably formed from the material in this cloud. (Can you match up the stars and galaxies in the two images? The images are at slightly different magnification.)
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