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Modern Cosmology
The study of the structure and
evolution of the Universe
The Universe is made of:
stars, galaxies, nebulae, and
many other celestial objects
Terrestrial planets
Terrestrial planets (small): Mercury, Venus, Earth, and Mars
Jovian planets
Jupiter, Saturn, Uranus, and Neptune
Speed of light:
300,000 kilometers per second
Light-year
the distance light travels in a year (9.5
trillion km)