| No. |
The Answers |
| 1 |
The stellar dust that actually evolves into young
stars come from the remnants of past nova and supernovas. Thus the particle for formation
of new stars actually comes from past stars that have died and other stellar particles. |
| 2 |
Currently the sun has a diameter of 1.4 X 106
kms or 1/100 AU while the redgiant of our star would be 1 AU big that is approx. 100 times
bigger than the current sun! |
| 3 |
Young stars when born are undergoing helium-hydrogen
nuclear fusion which produces considerable amount of heat. This also depends on the mass
of the star. A big star is more likely to be much hotter than smaller stars as they have
more reserves of fuels. Thus young stars are actually quite hot but not as much as during
the end of their lives. |
| 4 |
A supernova occurs as fuel runs out for a
supermassive star at which instance there is no more energy left over to contradict or
oppose the strong gravity. Thus the star shrinks and then grows up large due to the heat
caused by contraction. Then falling under the strong gravity contraction the supergiant
implodes! |
| 5 |
A neutron star have gravity around
300,000 times that on Earth. Plus neutron stars are typically about ten miles in diameter,
have about 1.4 times the mass of our Sun. |
| 6 |
Neutron stars also have very intense
magnetic fields - about 1,000,000,000,000 times stronger than Earth's. Neutron stars may
"pulse" due to electrons accelerated near the magnetic poles, which are not
aligned with the rotation axis of the star. These electrons travel outward from the
neutron star, until they reach the point at which they would be forced to travel faster
than the speed of light in order to still co-rotate with the star. At this radius, the
electrons must stop, and they release some of their kinetic energy in the form of X-rays
and gamma-rays. External viewers see these pulses of radiation whenever the magnetic pole
is visible. The pulses come at the same rate as the rotation of the neutron star, and
thus, appear periodic. |
| 7 |
Black holes are objects so dense that not
even light can escape their gravity and, since nothing can travel faster than light,
nothing can escape from inside a black hole. |
| 8 |
A white dwarf is a stage ahead of black dwarf and
still possess some heat while black dwarfs have cooled off. |
| 9 |
A protostar is the stage in the star evolution when
the gravity has pulled together interstellar dust and a new star is being formed. |
| 10 |
This is as supermassive stars are the only ones with
enough fuel reserves and extremely high gravity. When the fuel reserves finish so do the
high amount of outward energy opposing gravity. Thus the energy required to cause a
blackhole due to high gravity is only present in supermassive stars. |
| 11 |
Similar reason as above. They have the exact amount
of gravity required to convert into a neutron star. |
| 12 |
Same reason as above. A small star doesn't have
enough energy or gravity to cause a nova or a supernova and thus just shrinks down into a
dwarf. |
| 13 |
Sound requires a medium to travel. But novas create
tremendous amount of shock waves which can be detected by electromagnetic spectrum rays
reaching us. |
| 14 |
It is most possibly a remnant of an old star after a
nova or a supernova. |
| 15 |
Our sun is 4.6 billion years old and has reached
half its life. It is a small/medium star. |
| 16 |
These are detected by electromagnetic spectrum rays
reaching us. Also although we can't see it we can see how interstellar objects near black
holes behave to justify the presence of black holes. |
| 17 |
When the redgiant or supergiant is being formed. |
| 18 |
Stars use different fuels by using different layers
of fuels going towards the centre of a star. That is if the first fuel, most probably
Hydrogen, has been converted to Helium. Then helium is then converted to something else.
This stage continues until the first layer of fuel to carry on with this is finished. Then
the second layer is used until all of the fuel has been converted into stable elements
after which the star doesn't have enough energy to fuse any more. |
