Exogeology Jax

Observational Physics
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Cosmic microwave background radiation

How Parallax helped find Stars Distance

How the circumference of the earth was determined

Hubble's law

Kepler's laws of planetary motion

Figuring out the Earth's distance from the Sun

Finding the distance of stars by brightness

Measuring the Speed of Light

Michelson Morley Experiment

Olbers Paradox

Solar Eclipe

Stonehenge

Using Supernova to tell distance from a Galaxy