Currently we think that matter accounts for only about 27% of the cosmos, with dark energymaking up the rest.
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Q24: From the 1970s to the present, the
Q25: The presently accepted value of the Hubble
Q26: If the Hubble Constant is 70 km/sec/Mpc,
Q27: While a variety of factors can produce
Q28: What is the Big Bang?
A)an enormous explosion
Q30: What do most scientists believe existed before
Q31: Astronomers know the universe is expanding because:
A)everything
Q32: The two different kinds of surveys that
Q33: The concept that the direction of observation
Q34: What was there just after the Big
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