How do we know that pulsars are neutron stars? A) We have ...

[mrsjacobs44]

How do we know that pulsars are neutron stars?
 
  A) We have observed massive-star supernovae produce pulsars.
  B) Pulsars and neutron stars look exactly the same.
  C) No massive object, other than a neutron star, could spin as fast as we observe pulsars spin.
  D) Pulsars have the same upper mass limit as neutron stars do.
  E) none of the above

Question 2

Masses of the planets are easiest to determine if:
 
  A) they are terrestrial and the extra size of the planet's disk can be measured.
  B) they are jovian and their oblateness can be found.
  C) they have natural satellites whose motions can be precisely measured.
  D) they are dense and easily deflect the path of passing spacecraft.
  E) they move rapidly and their periods are easily measured.

[irishcancer18]

Answer to Question 1

C

Answer to Question 2

C

[mrsjacobs44]

Great answer, keep it coming

[LVPMS]

Thanks for the timely response, appreciate it