Theoretical calculations indicate that a star more massive than some threshold around 15 or 20 solar masses will collapse and become a black hole when its nuclear fuel is exhausted.
Indicate whether the statement is true or false
Question 2
In the context of neutron stars, if pulses from pulsars are no longer than 0.001 second, then the objects are larger than 0.001 light-second, or 300 km in diameter.
Indicate whether the statement is true or false