The sun will take about…….billion years to become white dwarf.
a) 4
b) 5
c) 9
d) 15
Which one of the following is the nearest known white dwarf to us?
a) Sirius B
b) Alpha Centauri
c) Aries
d) Rigel
What
is distance between earth and nearest known white dwarf (Sirius B) in light
years?
a)4.5
b)
6.5
c) 8.6
d) 1.5
If the initial mass of the star is between one to five times of solar mass, the red giant becomes a………
a) white dwarf
b) neutron star
c) black hole
d) none of these
Explanation:A neutron star is the collapsed core of a massive supergiant star, which had a total mass of between 10 and 25 solar masses, possibly more if the star was especially metal-rich.
The contraction of the star continues until it becomes so dense, such that it is composed almost entirely of ………
a) electrons
b) protons
c) neutrons
d) atoms
A neutron star is so dense that a teaspoon of neutron star material would weigh about ……. tons.
a) 10
b) 10 thousand
c) 10 million
d) 10 billion
