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The sky is blue because the atmosphere __________ sunlight more for blue wavelenghts.

Sudden, bright, explosive events originating on the Sun’s surface which release energy associated with the Sun’s magnetic field are called

Prominent groups of stars in the night sky that appear to an Earth observer as distinct patterns are called __________.

Which of the following is a technique used by astronomers in their search for other planetary systems?

Hurricanes derive their energy from __________.

The branch of astronomy that studies the structure and evolution of the entire universe is called

The Great Red Spot has been visible on Jupiter for at least

When less than half the Moon is illuminated as seen from Earth, it is called a

Earth’s axis is tilted ______________ degrees from the normal to the ecliptic plane.

This planet has the largest known volcano in the solar system, Olympus Mons.