PHYS 005 Study Guide - Comprehensive Final Exam Guide - Galaxy, Milky Way, Dark Matter
21 Nov 2018
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New worlds to colonize for human beings. Where to get new resources after ours are depleted. Know the risks that might harm us. Philosophical question & why- where does it all come from & why. Pismis 24- clusters of stars (newly formed) Sun is 93 mil miles away from earth. Closest star to the sun- proxima centauri. Takes 8 minutes before we notice that it is gone. 4. 25 light years away- 24,960,643,334,537 mi away. Juno -fastest man-made object -went to jupiter 2016. Still takes 17,300 yrs to get to proxima centauri. Almost spherical bodies made of rocks & gases that travel around a star. Stars-huge balls of hot glass that produce energy through nuclear fusion in their core. Fusion - places w. high temp & pressure. Stars turn 4 hydrogen to 1 helium. Solar neighborhood- 150,000 light years in total. Million of stars bounded by gravity, may also have gas, dust, & dark matter.
