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The Local Sky

• Why is the daytime sky blue?
• What is the zenith?
• What are altitude and azimuth?
• What is an arcminute?

Stars

• Approximately how many stars can we see with the naked eye?
• What is the Sun?
• How far is the Sun from us?
• Which is the brightest star in the sky?
• What does it mean to say that two stars have magnitudes 1 and 4?

Planets

• Why do stars "twinkle"?
• What is the best way to tell a planet from a star?
• How many planets can we see with the naked eye? Which ones?

Other Objects

• What is a galaxy?
• Can we see any galaxy with the naked eye? For example?
• Are we inside a galaxy?