AST101H1 Lecture Notes - Lecture 22: Escape Velocity, Methods Of Detecting Exoplanets, Horsepower

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST101H1
• Professor: Michael Reid

Document Summary

Are we alone? : there are about 400 billion stars in the milky way galaxy, we have only begun our search in the galaxy. The beginning of life: two possibilities of how life began on earth. Natural processes due to which life arose on earth as a result of inorganic materials converting into the building blocks of life or the first simple life forms over long periods of time. Possibility from clay, lightning, or deep sea vents. A process in which life from somewhere or rather, everywhere in the universe is transported to newly formed planets through asteroids, comets, etc. A source of nutrients: for example: the food we eat. Energy (in the form of sunlight, heat, etc. : for example: heat from geological activity such as volcanoes. Liquid water (or other liquid: for example: oceans of liquid water, there is significant liquid water present in the solar system apart from on earth.