Twenty years after it first reached space, the Hubble Space Telescope still tirelessly circles the Earth, snapping images of the cosmos and continuing to fulfill its role as the beloved Comeback Kid of celestial imaging. “I don’t think anybody thought Hubble would be around this long. It’s sort of like the little engine that could,” says Kevin Marvel, executive officer of the American Astronomical Society, in Washington, D.C. “It’s just produced result after result after result.” The venerable telescope blasted off inside space shuttle Discovery back on April 24, 1990, and the crew of astronauts deployed the telescope the next day. – From NPR