Space- Chapter 9

The galaxy that includes the solar system appears as a hazy white band in the night sky

A huge collection of stars, planets, gas, dust that is held together by gravity

A collection of stars held together by gravity

A collection of 50 to 100 stars. Open stars appear on the main band if the milky way

A collection if 100,000 to a million stars that is arranged in a spherical shape. Globular cluster are found along the Milky Way

The small group of about 40 galaxies that includes the Milky Way

A gigantic cluster of 4 to 25 clusters of galaxies that is hundreds of millions if light years away

The study if the universe

The change in pitch of a sound due to the motion of the source relative to an observer. The change in frequency of light source due to its motion relative to an observer

The effect in which objects moving away from an observer have theirs wavelengths lengthened towards the red end of the spectrum

The effect in which objects are moving towards an observer. Have their wavelengths shortened, towards the blue end of the spectrum

The event that may have caused the expansion of the universe 14 billion years ago

The radiation left over from the Big Bang, which fills the universe

The most abundant form of matter in the universe, invisible to telescopes

A form if energy that makes up nearly three quarters of the universe, has the effect of increasing the expansion of the universe

When viewed from above it looks like a pinwheel

Range in shape from a perfect sphere to a stretched up ellipse

They don't have a regular shape

the process in which energy is emitted as particles or waves.