NASA's series of Great Observatories satellites are the following four powerful space-based telescopes. What is the missing word? (hint: An Indian-born American scientist known for his 'limit') 1. The Hubble Space Telescope 2. The Compton Gamma Ray Observatory 3. The Spitzer Space Telescope 4. ___ X-ray Observatory
Chandraatri Chandra
chandra chandraatri
chandra
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Chandra