What methods did astronomers use to create new theories about the universe?

List three reasons why people might be fascinated by something as dangerous as a nuclear weapon.

The united states economy is one in which producers are generally free to produce what they want and consumers are free to purchase what they desire, so long as no laws are broken. at the same time, however, the government does regulate some aspects of the economy. the u.s. can best be described as which of the following a mixed economy b liberated economy c command economy d market economy

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