Astronomy and Astrophysics: Space Science in the Twenty-First Century -- Imperatives for the Decades 1995 to 2015 |
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acceleration accretion disk active galactic nuclei angular resolution antiprotons aperture arcsec array ASTRONOMY AND ASTROPHYSICS ASTROPHYSICS IN 1995 AXAF black hole clouds clusters collecting area compact composition cosmic rays density detailed detect detectors diameter electrons emission energy range energy spectra EXPECTED STATUS Explorer facilities fundamental gamma gamma-ray astronomy gravitational ground-based hard x-ray high-energy http://www.nap.edu/catalog/750.html ASTRONOMY http://www.nap.edu/catalog/750.html NEW INITIATIVES http://www.nap.edu/catalog/750.html SCIENCE OBJECTIVES HXIF imaging Infrared Space Observatory instruments interferometry interstellar interstellar medium isotopic launch mass matter measurements microarcsecond milliarcsec milliarcsecond mission NASA National Academy neutron stars nucleosynthesis Observatory optical orbit particles phenomena physics planets probe quasars radiation radio red shifts region relativistic relativistic jets scientific sensitivity SIRTF solar system space science Space Station Space Telescope spacecraft spectral spectrometer spectroscopic spectrum star formation stellar structure submillimeter supernova task group tick mark ultraheavy ultraviolet universe VHTF VLBI wavelengths x-ray astronomy