A ball of gas that gives off a tremendous amount of electromagnetic energy

The distance that light travels in one year

An object so massive and dense that even light cannot escape its’ gravity

Rotates very rapidly, is a very small but incredibly dense ball of neutrons

A hot, extremely dense core of matter...

Explosion that releases energy and stellar material into space

The arrangement of electromagnetic radiation according to wavelength

The process by which nuclei of small atoms combine to form new, more massive nuclei, the process releases energy

A form of energy that flows between two samples of matter because of their differences in temperature

This describes all the different kinds of energies released into space by stars such as the sun.

The theory that all matter and energy in the universe was compressed into an extremely small volume that 13 and 15 billion years ago exploded and began expanding in all directions

Radiation uniformly detected from every direction in space; considered a remnant of the big bang

The displacement of spectral lines toward bigger wavelengths (red) in radiation from distant galaxies.

Type of matter that does not give off light but has gravity we can detect