What would be the next step in the scientific process for the Copernican heliocentric model?
In 1500s, Copernicus reintroduced the heliocentric model that the ancient Greeks had rejected, and it began to gain favor among some scientists. He suggested that the planets all orbit around the Sun in perfect circles, as shown in the figure to the right. This offers a much more elegant explanation of retrograde planetary motion than the geocentric model.
Answer: Make predictions from Copernicus's model, and verify them with observations.
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You observe a galaxy that is 100 million light-years away. Which of the following do you see?
A) The light from the galaxy as it is today, and it is blueshifted. B) The light from the galaxy as it is today, and it is redshifted. C) The light from the galaxy as it was 100 million years ago, and it is blueshifted. D) The light from the galaxy as it was 100 million years ago, and it is redshifted. E) Nothing: the galaxy lies beyond the cosmological horizon.
Which of the following is the nation's leading spokesperson on matters of public health?
What will be an ideal response?
One of the fundamental ideas in the development of quantum mechanics was that
A. no two particles can have the same energy. B. all particles have wave properties. C. electrons and protons are the only particles D. all particles are formed by the interaction of electromagnetic waves. with mass.
Which element is the last to be produced by fusion in the cores of the most massive stars (just before their lives end in supernova explosions)?
A) iron B) lead C) oxygen D) uranium E) hydrogen