What people are saying - Write a review
We haven't found any reviews in the usual places.
Units of measurement
Origin of whitedwarf stars
22 other sections not shown
Other editions - View all
accretion disk active galaxies atoms billion binary BL Lac black hole black-hole bright Chapter clocks close the universe collapse companion core cosmological Cygnus X-l degeneracy pressure density deuterium discovered distance dust dwarfs earth Einstein's theory emission lines emit energy source event horizon exist expansion explosion galactic gamma rays gas clouds helium high-energy high-speed electrons Hubble constant Hubble's hydrogen idea indicate infrared intergalactic km/sec look luminosity magnitude massive stars measure megaparsecs Milky Way galaxy model world motion Nebula neutron stars nucleus objects observations Observatory optical orbit parsecs particles photograph photons produce pulsars quasars radio astronomers radio emission radio galaxies radio sources radio telescope radio waves real world red-giant redshifts rocket rotation scientific solar masses space spectra spectrum spiral galaxies star's Steady State theory stellar evolution supernova synchrotron radiation theoretical theory of gravitation tion visible wavelength white holes white-dwarf stars x-ray sources