Planetary nebula are associated with _______________.
When a low-mass star has exhausted all its hydrogen, the nex…
When a low-mass star has exhausted all its hydrogen, the next stage is _____________.
An observer on a planet sees a spaceship approaching at 0.5c…
An observer on a planet sees a spaceship approaching at 0.5c. A beam of light projected by the ship would be measured by this observer to travel at _____.
There have been over a hundred primodial black holes found b…
There have been over a hundred primodial black holes found both in the Milky Way and other galaxies.
Which is NOT a cause of short gamma ray bursts?
Which is NOT a cause of short gamma ray bursts?
Pulsars are the same as ________________.
Pulsars are the same as ________________.
Give the steps in order of the life cycle of a high mass sta…
Give the steps in order of the life cycle of a high mass star.
Most galaxies have at least one supermassive black hole.
Most galaxies have at least one supermassive black hole.
Pulsars are the same as:
Pulsars are the same as:
A low-mass star will become a white dwarf when the fusion ha…
A low-mass star will become a white dwarf when the fusion has ceased