The great contribution of nicholas copernicus was to _________.

The interstellar clouds called molecular clouds are _______.

The james webb space telescope is designed primarily to observe __________.

The stars in our sky twinkle in brightness and color because of _________.

The virgin galactic will soon _____.

Select all of the answers that apply. dark matter may be _____.

Stars with masses less than ____ produce most of their energy via the proton-proton chain.

If a star is large, it will remain in the main sequence _____ a small star.

If a star has a low luminosity and also a high surface temperature then it must have __________.

For los angeles, during the autumnal equinox there are about _____ hours of daylight.

By examining the widths of the spectral lines we can find information about a star's _________.