ASTR 100 Study Guide - Final Guide: Barred Spiral Galaxy, Elliptical Galaxy, Accretion Disk
Document Summary
Transit search technique best for finding earth like planets. Depth in the dip in brightness most directly determined by the size of the planet. Hundreds of extrasolar planets have been discovered. Doppler technique tells us the size of the wobble (apparent velocity change in the star) which tells us the planet"s mass. Life happened millions of years after heavy bombardment. Life is made up of common ingredients but not the most common in the universe. Drake equation is a way to guide our thinking about extraterrestrial life. Extremophiles are the most likely candidate for simple extraterrestrial life. Europa = most likely place to find macroscopic life in our solar system (jupiter"s pull heats the ocean underneath the sheet of ice at the top, possibly harboring life) Titan - would change the way we view life (this saturn moon has large methane & ethane pools)
