| http://www.w3.org/ns/prov#value | - Stars orbiting a black hole at the center of our Galaxy, exo-planets, and quantitative cosmology ??? and the technologies that underlie them ??? such as IR detectors, multi-mirror telescopes, long baseline radio interferometry, orbiting x-ray and gamma-ray telescopes ??? are only a few examples of topics that are both exciting and rich in physics.
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