What best describes the universe?

Which of these is the largest?

Which observation provides evidence that galaxies are moving apart and the universe is expanding?

If light travels about 9.5 trillion kilometers (km) in one year, and a star is 5 light-years from Earth, about how far away is ti?

Which type of telescope is used to analyze the composition of dust clouds in space?

Which of the following correctly shows the organization of the universe, from smallest to largest units?

Which distance would a light-year be most appropriate for measuring?

What is the best way for a scientist to estimate the age of a star?

Before the Hubble telescope was put into orbit, what was NOT well know?

The Big Bang Theory, formation and expansion of the universe is supported by the observed...

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