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8 terms

big bang theory

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the big bang
a violent explosion occured 13.7 billion yrs and since then has contiuned expanding at an increasing rate
reasons to believe BB
radio and microwaves are still being picked up in space and in our atmosphere
telescopes-radio
Parkes Radio Telescope
can operate all day through cloud
telescopes-optical
use light
can only operate at night with no clouds
high energy waves
used to study dust, gas, and nebulas
galaxy
billions of stars
milky way
nuclear fusion
the way in which stars create energy by constantly reacting hydrogen to make helium
star life cycle
nubela, star red giant, red dwarf, white dwarf, supernova
some stars explode called supernovas (collapse, explode, collapse again) and some create black holes.