Author Question: Long-period comets are believed to originally come from A) the Kuiper belt. B) the Oort cloud. ... (Read 60 times)

AEWBW · **on:** Jul 27, 2018

Long-period comets are believed to originally come from

A) the Kuiper belt.
B) the Oort cloud.
C) the satellite system of Jupiter.
D) the interstellar medium.
E) the asteroid belt.

Question 2

How do we know that pulsars must be neutron stars?

A) Pulsars have the same upper mass limit as neutron stars do.
B) No massive object, other than a neutron star, could spin as fast as we observe pulsars to spin and remain intact.
C) This is only a theory that has not yet been confirmed by observations.
D) We have observed massive-star supernovae produce pulsars.
E) Telescopic images of pulsars and neutron stars look exactly the same.