We Find Most Stars Still on the Main Sequence Because

Q147: Novae and Type II supernovae are essentially

Q148: Where was supernova 1987A located?<br>A) in M13,

Q149: The initial rise off the main sequence

Q150: A white dwarf has the mass of

Q151: The least massive red main- sequence stars

Q153: In the light curve of a nova,

Q154: Compared to the interstellar medium, the gases

Q155: While luminous enough to be seen with

Q156: Type II supernovae occur when their cores

Q157: A star may undergo two or more