1906-2004 1941- activegalaxies astrometry astronomy astrophysics astrophysicsandcosmology atmospheres blackholes(astronomy) circumstellarmatter comets congresses cosmicabundances cosmicdust cosmicrays cosmochemistry cosmology darkmatter(astronomy) dyson electronicbooks evolution formation galaxies gammarays gases general hyperspace interstellarhydrogen isotopegeology life matter measurement molecularastrophysics moleculardynamics molecularevolution nonfiction origin physics plasma(ionizedgases) plasmaastrophysics qb450 qb790 redshift science science/mathematics science:generalissues solids spacescience starbursts stars supernovae supernovaremnants technique universe whipple