Cosmic Catastrophes

Abby asteroid asteroid belt astronomers atmo atoms Barek Barnard's star believe binary black hole blast Cady catastrophe close cosmic rays craters crew cycle distant Dolvar dust clouds earth earth's atmosphere earth's magnetic field electrons energy enormous event horizon field reversals five billion future Gaia galaxy gravity Hale Observatories Hale Observatories photo happen heat human hundred hydrogen inside interstellar Keita kilometers Little Ice Age look Makara Marret Mars mass matter meteor meteorite Milky molecules moon moving Nadra nearby supernova neutron never Nyra occur orbit oxygen ozone layer particles perhaps Peter planet planetary nebula prediction produce protons pull pulsar radiation reach red giant sail science fiction scientists shelters ship solar system solar wind space spacecraft species spiral arms star starship sun's sunspot supernova supernova explosion surface survive telescope temperature theory thought thousand trigger ultraviolet universe wave