described at URL: https://svs.gsfc.nasa.gov/14434 URL: https://svs.gsfc.nasa.gov/vis/a010000/a014400/a014434/pulsar_art_2.gif determination method or standard:...
method: SHA-1 described at URL: https://svs.gsfc.nasa.gov/14434 URL: https://svs.gsfc.nasa.gov/vis/a010000/a014400/a014434/transitional_pulsar_art.webm...
described at URL: https://svs.gsfc.nasa.gov/14434 URL: https://svs.gsfc.nasa.gov/vis/a010000/a014400/a014434/pulsar_art_1.gif determination method or standard:...