5.2 Vocab

stellar equilibrium

• the balance between gravity and nuclear fusion that keeps a star stable in size and shape

• the process by which a star forms from a cloud of gas and dust

• the stage in a star's life when it begins to expand and cool

• the phenomenon where a star collapses under its own gravity

sunspot

• the cooler areas on the sun

• the hottest parts of the sun

• regions of intense solar flares

• the dark side of the moon

nebula

• cloud of gas and dust.

• a type of star

• a planet's atmosphere

• a black hole

apparent magnitude

• the brightness of a star as seen from Earth

• the distance of a star from Earth

• the size of a star in the universe

• the color of a star's light

absolute magnitude

• the brightness of a star if all the stars were at a uniform distance from Earth

• the total energy output of a star

• the apparent brightness of a star as seen from Earth

• the distance of a star from Earth