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In 2007 the Hubble detected the first-ever organic molecule in the atmosphere of a planet orbiting outside our solar system. An artist's view of planet HD 189733b.
Credit: NASA/ESA/G. Bacon (STScI)
In 2001, Hubble observed an explosion 10 billion light-years from our planet greatly bolsters the case for the existence of a mysterious form of "dark energy" pervading the cosmos.
Credit: NASA and A. Reiss
Throughout its lifetime in orbit, some of the most spectacular images have been of mysteries from outside our solar system. The Cone Nebula is 7 light-years long and 2,500 light-years away from Earth, according to NASA.