Unit 1: The Universe

What is the distance between the Earth and the Sun?

• A Light Year

• An Astronomical Unit

• A Parsec

• 1 Million Kilometers

What is the field of science that talks about celestial objects and celetial phenomena, their position, motion, evolution, chemistry and physics?

This is a sub-branch of astronomy that deals with the physics of celestial objects and phenomena.

This is the thermal radiation left over from the time of recombination in Big Bang cosmology. Also known as "relec radiation"

• Spectrum

• Red Shift

• Cosmic Microwave Background

• The Big Bang

This is the field of science that discusses the universe as a whole, which includes the origin, evolution and ultimate fate of the Universe.

An increase (or decrease) in the frequency of sound, light or otherwaves as the source and observer move toward (or away from) each other.

• Doppler Effect

• Hubble's Law

• Cosmology

• The Big Bang

A law of cosmology stating that the rate at which astronomical objects in the Universe move apart from each other is proportional to their distance from each other.

• Murphy's Law

• Newton's Law

• Kepler's Law

• Hubble's Law

The distance light travels in one Earth year

This is the displacement of spectral lines toward longer wavelengths in radiation from distant galaxies and celestial objects.

• The Big Bang

• Cosmic Microwave Background

• Redshift

• Astrophysics

This is a band of colors, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.

• Doppler Shift

• Spectrum

• Cosmic Microwave Background

• Cosmology