An artist's illustration of an Earth-like planet. The search for planets that are similar to Earth is one of NASA's main goals. Many planets have already been discovered orbiting other stars, but so far only larger planets (the size of Jupiter or larger) have been found. New missions are being planned by NASA which will be able to detect smaller Earth-sized planets. Some of these missions will also try to detect signs of life on these planets by studying emissions in their atmospheres.
BILLIONS OF EARTHS COULD BE OUT THERE!!
5/2/11
What If The Earth Had Rings Like Saturn?
An examination of what Earth would be like with rings, from different latitudes and cities across the globe.
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