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Which Jovian planets appear blue due to methane clouds in their atmosphere? Check all that apply.

Saturn has a similar atmospheric chemistry to Jupiter, but looks different. Why is this?

Rings around a planet are permanent features that stay stable for billions of years.

The Keck telescopes are located on the top of a tall, extinct volcano in Hawa’ii. The Hubble Space Telescope is in outer space. The Kecks and the Hubble have the same resolution and light-gathering power. What advantages does the Hubble have over the Kecks?

A parsec is the distance at which the change in the star’s apparent position with a baseline of 1AU is one arc-second.

Which planet is closest to Earth?

Saturn’s rings are made of 

The largest radio telescopes are smaller than the largest optical telescopes.

The radius of the Earth is closest to

Which of the following events, all of which involve waves, involve the use of electromagnetic waves?