Quiz 3

1. Approximately how many stars can we see with the naked eye, in very good viewing conditions?
a. A few hundred.
b. A few thousands.
c. About 1 million.
d. About 100 billion.

2. Which one of these planets cannot be seen with the naked eye?
a. Mercury.
b. Venus.
c. Saturn.
d. Neptune.

3. How long does it take a star to come back to the same location in the sky as the Earth rotates?
a. 23 hours and 56 minutes.
b. 24 hours.
c. One month.
d. One year.

4. Which of the following is a consequence of the Earth's precession?
a. In a few thousand years Polaris will no longer be our North Star.
b. The solar day is a little longer than the sidereal day.
c. Summer temperatures on Earth are warmer than winter temperatures.
d. The whole sky seems to rotate around us once a day.

5. If you had a clear view of the sky tonight, you would see that Jupiter
is in the Constellation Sagittarius. Is Jupiter always in that constellation?