Title: Week 1 Quiz
Course: ASTRON103: The Evolving Universe: Stars, Galaxies, and Cosmology (001) DHH SU18 > Section: Week 1

Q: Given that an iPhoneX has a mass of 174 grams (174 g), how many IPhoneX's would you need to have the same mass as the Sun? Express your answer in scientific notation.

Q: Suppose a star that is 20 light years away from Earth explodes. How long will we have to wait, here on Earth, to see the explosion? If we set out toward the star immediately after we see the explosion, what's the soonest we could arrive?

Q: How many degrees does the Sun move per day relative to the fixed stars? How many days does it take for the Sun to return to its original location relative to the fixed stars?

Q: Describe a practical way to determine in which constellation the Sun is found at any time of the year.

Q: You step outside on a Wednesday at 4PM and see the Moon rising along the Eastern Horizon. What phase will be the moon be 2 Wednesdays from now (2 weeks later)?

Q: During a retrograde loop of Mars, would you expect Mars to be brighter than usual in the sky, about average in brightness, or fainter than usual in the sky? Explain.

Q: In a part of Earth’s orbit where Earth is moving faster than usual around the Sun, would the length of the solar day change? If so, how? Explain.

Q: What is the minimum degrees latitude North on Earth one must be in order to experience 24 hours of daylight during the summer? Explain?

Q: Describe how eclipses (both solar and lunar) would be different if the Moon was two times farther away from Earth. What if the moon was two times closer to Earth?

Q: Your friend sees the moon in the sky with 75% of its face lit up on the left side. What phase is the moon in and at approximately what time will this moon set?