Astronomy Chapter 28 Vocab- "Life in the Universe"

particulate, galactic, stellar, planetary, chemical, biological, and cultural

the seven phases of cosmic evolution

Urey-Miller experiment

an experiment, first done in the 1930’s, that demonstrated the formation of amino acids from the gasses present in the early Earth’s atmosphere, excited by lightning

extremophiles

organisms that survive in environments long thought impossible

Drake equation

a series of estimates of factors that must be present for a long-lasting technological civilization to arise

Pioneer 10

a spacecraft that launched in 1972 and contained a plaque to explain its existence to extraterrestrials

SETI array

an array of telescopes that is designed to search for extraterrestrials signals; no true extraterrestrial signal has been found