ASTR HW 1 (Lecture 1)

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Homework Questions

Before starting these question, please watch Lecture 1. You must submit them at one time. The submit button is at the bottom. Please only submit once.

The point on the celestial sphere that is above the Northern horizon, at an angle equal to your latitude on Earth, is called *

1 point

the celestial meridian, also called the prime meridian.

the Celestial North Pole.

the celestial equator.

the Sidereal day.

the Zenith.

Suppose that this evening at 9:34 PM you see star A at a particular point in the sky. At what time should you look for star A at the same point in the sky in three days? *

1 point

9:22 PM.

8:22 PM.

9:22 AM.

at 9:50 PM.

at 8:34 PM.

Suppose that you would like to study star A all year round. Its declination is 52 degrees above the celestial equator. At which of the following locations on Earth could you be to observe this star all year round? *

1 point

only at latitudes above 85 degrees N

only at a latitude of 52 degrees N

only at the South Pole

only at latitudes above 38 degrees N

The axis of the Earth *

1 point

remains stationary, while the Earth rotates around it.

slowly moves, or precesses, while the Earth rotates around it.

slowly moves, or precesses, during which the Earth does not rotate around it.

rapidly moves (over a period of about three years), or precesses, while the Earth rotates around it.

How far, in degrees, does the sun move around the ecliptic per day? *

1 point

3 degrees.

about 89 degrees.

about 1 degree.

about 0.001 degree.

In astronomy, constellations *

1 point

are regions of the night sky that are defined for convenience.

are shapes naturally formed amongst the stars.

are astronomical objects formed from dark matter, that look like objects found on Earth, or like mystical creatures.

What does this image look like to you? *

1 point

an air pump

a deer.

an arbitrarily-drawn part of the celestial sphere that doesn't really look like anything.

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