Astronomy

The vast majority of galaxies in our universe are moving away from us.  We know this because we observe __________ in the galaxies absorption spectra.

• Redshift
• Blueshift
• Turbulance
• Superposition

Why is the light from distant galaxies red-shifted?

• They produce more red light than nearby galaxies
• They are moving away from us
• The longer wavelengths are filtered out more by dust
• They are moving toward us

Brightness of a star as seen from Earth

• parallax
• apparent magnitude
• absolute magnitude
• spectrum

What is a large celestial body that is composed of hydrogen gas and that emits light through nuclear fusion?

• Nebula

• Star

• Galaxy

• Planet

Nebulae are considered "Stellar Nurseries" because...

• Planets are created from the gases

• Stars form from them

• Asteroids are formed from them

• They provide spectacular child care

The event that marks the beginning of our known universe

• Theory of Evolution
• Big Bang Theory
• Cell Theory
• Blackhole theory

a star in which the electrons and protons have become neutrons

• supernova
• neutron star
• black hole
• pulsar

The brightness of a star as it would be a distance of 32.6 light years from Earth

• light year
• absolute magnitude
• apparent magnitude
• parallax

In the diagram given, what happens as we move to the left?

• Stars Get Larger
• Stars get Colder
• Stars get hotter

Which star is the coldest?

• Yellow Star
• Red Star
• Orange Star
• Blue Star