What is a spiral galaxy? A spiral galaxy typically has a rotating disc with spiral ‘arms’ that curve out from a dense central region. The Milky Way is a spiral galaxy. Four classes are used to classify galaxies: spiral; barred spiral;...
Is Milky Way spiral or bar galaxy? The Milky Way is a large barred spiral galaxy. All the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it...
What are the 4 types of galaxies? The smallest of galaxies contain a “mere” few hundred million stars while the largest galaxies contain up to one hundred trillion stars! Scientists have been able to segment galaxies into 4 main types: spiral,...
What makes a neutron star a pulsar? Pulsars. Most neutron stars are observed as pulsars. Pulsars are rotating neutron stars observed to have pulses of radiation at very regular intervals that typically range from milliseconds to seconds. Pulsars have very strong...
Do all supernova remnants contain pulsars? Pulsars are thought to be formed in supernova events. There are actually only a few pulsar–supernova associations. Many young supernova remnants do not contain detectable pulsars, and most pulsars are not in supernova remnants. Is...
Do neutron stars spin very rapidly? The power from the supernova that birthed it gives the star an extremely quick rotation, causing it to spin several times in a second. Neutron stars can spin as fast as 43,000 times per minute,...
What can you never know about a black hole quizlet? equal to the speed of light. Which of the following can you never know about a black hole? The elements of the material that has fallen in. Neutron stars have densities...
What causes pulsars to pulse? The magnetic axis of the pulsar determines the direction of the electromagnetic beam, with the magnetic axis not necessarily being the same as its rotational axis. This misalignment causes the beam to be seen once for...
Why are white dwarfs not pulsars? A pulsar is a type of neutron star, a collapsed core of an extremely massive star that exploded in a supernova. Whereas white dwarfs have incredibly high densities by earthly standards, neutron stars are even...
Why do pulsars slow down quizlet? Pulsars are nothing more than rapidly spinning neutron stars. The rapidly spinning neutron star along with its magnetic field results in a directed beam of electromagnetic energy. Theory predicts that pulsars should lose energy and...