[NATS 1880] - Final Exam Guide - Ultimate 41 pages long Study Guide!

• School: York University
• Department: Natural Science
• Course: NATS 1880
• Professor: Paul Delaney

Document Summary

3. 1: the universe and life: astro(cid:374)o(cid:373)(cid:455) fo(cid:272)used o(cid:374) the (cid:373)otio(cid:374)s i(cid:374) the sk(cid:455). Plenty of time for life to begin and evolve. Basic chemical elements that make up the earth are present throughout the universe. The same physical laws that operate on earth operate throughout the universe. The same process that made life possible on earth, may make life possible on other worlds. 3. 2: the structure, scale, and history of the universe: (cid:862)cos(cid:373)i(cid:272) address(cid:863): our pla(cid:272)e i(cid:374) the u(cid:374)i(cid:448)erse, the milky way galaxy is a cluster of stars containing more than a hundred billion stars. The same is for when we send out messages through radio signals. This means that in the past, the galaxies must have been closer together which we must reach back to o(cid:271)ser(cid:448)e (cid:449)he(cid:374) the e(cid:454)pa(cid:374)sio(cid:374) (cid:271)ega(cid:374). Using the observed rate, scientists calculated that it occurred around 14 billion years ago: other than dark energy, another two reasons provide evidences that the universe began in big.