Astronomy Honors 2013
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Suppose we imagine the Sun to be about the size of a grapefruit. Which of the following describes the size and distance of Earth on the same scale?
Earth is the size of a ball-point about 15 meters away from the Sun.
Suppose we imagine the Sun to be about the size of a grapefruit. How far away are the nearest stars (the three stars of Alpha Centauri)?
Which of the following has your "address" in the correct order?
you, Earth, solar system, Milky Way, Local Group, Local Supercluster
What is an astronomical unit?
the average distance from Earth to the Sun
What is a light-year?
the distance light will travel through space in a year
What makes the North Star, Polaris, special?
It appears very near the north celestial pole.
You are standing on Earth's equator. Which way is Polaris, the North star?
the northern horizon
If you are located in the Northern Hemisphere, which of the following correctly describes a relationship between the sky and your location?
The altitude of the north celestial pole equals your latitude.
- It is possible to see all the constellations from Earth's equator.
- Some constellations can be seen in both the winter and summer.
- Most constellations will be recognizable hundreds of years from now.
- There are only 88 official constellations.
- Some constellations can be seen from both the Northern and Southern hemispheres.
Which of the following statements about the celestial equator is true at all latitudes?
It represents an extension of Earth's equator onto the celestial sphere.
What is the ecliptic?
the path the Sun appears to trace around the celestial sphere each year
Which of the following statements about circumpolar stars is true at all latitudes?
They always remain above your horizon.
Orion is visible on winter evenings but not summer evenings because of
the location of Earth in its orbit.
Why do we have seasons on Earth?
As Earth goes around the Sun and Earth's axis remains pointed toward Polaris, the Northern and Southern hemispheres alternately receive more and less direct sunlight.
on the equinoxes the northern and southern hemispheres....
Both the Northern and Southern hemispheres receive the same amount of sunlight
during the summer solstice....
The Northern Hemisphere receives the most direct sunlight
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