Why Are Black Holes Called "Black

Q53: The first confirmed black hole, Cygnus X-1,

Q54: Neutron stars radiate most of their energy

Q55: A neutron star must have a mass

Q56: What is a "hypernova," and how do

Q57: Gas falling into a black hole:<br>A) is

Q59: In a binary system containing two neutron

Q60: Extremely old pulsars that have experienced large

Q61: An astronomer examining a compact object could

Q62: A hypernova is a violent event caused

Q63: The jets emitted by compact objects are