The stars were closer. All of the above e. 64 times e. Molecular Clouds can be observed a. Using infrared telescopes to detect ionized gas in the clouds b. By looking for blue wispy regions near stars e.
Massive stars have higher opacity a.
None of the above e. They are unstable c. The helium flash destroys them. Is the minimum radius of a neutron star d. Is the biggest black hole possible e.