The average distance from the Earth to the Sun is

What shape is the Milky Way?

Which BEST describes the center of the Milky Way?

Which BEST describes the age of stars in the Milky Way?

Which unit of measure BEST describes the distance between stars within a galaxy?

The Aurora Borealis, sometimes called the Northern Lights, is a broad display of faint light in the northern skies at night. What is the main cause of these lights?

One evening, several regional electrical power grids were disrupted. At the same time, cellphone users lost service. Which solar phenomena is the most likely cause?

If the Sun stopped producing energy, then all fusion would cease in its

Which of these statements about the properties of a star is TRUE?

The term for the total rate at which a star emits radiation energy is:

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