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PCC Astronomy Exam #1 Review Questions and Answers
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PCC Astronomy Exam #1 Review Questions and Answers You are on a camping trip, far away from city lights. You look up into the dark night sky, and see stars, some brighter, some dimmer. All the stars you see with your unaided eye are a. in our solar system b. equally close to the Sun c. in the...

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  • October 27, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • pcc astronomy exam 1 review questions and answers
  • you are on a camping trip far away from city ligh
  • the astronomical unit au as defined by astronome

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PCC Astronomy Exam #1 Review
Questions and Answers
You are on a camping trip, far away from city lights. You look up into the dark night sky,
and see stars, some brighter, some dimmer. All the stars you see with your unaided eye
are

a. in our solar system
b. equally close to the Sun
c. in the Milky Way Galaxy
d. outside the universe
e. just reflections of the Sun from a shiny surface beyond Pluto - answer c. in the
milky way galaxy

The Astronomical Unit (AU) as defined by astronomers is

a. a distance of one light year
b. the average distance between the Earth and the Sun
c. the time it takes for the Earth to orbit the Sun once
d. the distance the Earth travels in orbit in one day - answer b. the average distance
between the Earth and the Sun

The location of the Earth in the Milky Way Galaxy is

a. in the center of the Galaxy
b. on the edge of the Galaxy as far from the center as you can measure
c. a little less than 30,000 LY from the center - answer c. a little less than 30,000 LY
from the center

Even with the best and largest telescopes, we can't see all the stars in the Milky Way
Galaxy, even though these same telescopes can show us other galaxies. Why is that?

a. starlight isn't able to travel through black space
b. the Milky Way Galaxy turns too quickly
c. dust in the space between stars builds up over large distances and blocks the light of
stars behind the dustier parts of the Milky Way - answer c. dust in the space between
stars builds up over large distances and blocks the light of stars behind the dustier parts
of the Milky Way

Which of the following is NOT an argument for showing that the Earth must be round:

a. during an eclipse of the Moon, the shadow of the Earth is always seen to be round

, b. when ships travel a large distance away, we see their hulls disappear first and their
masts disappear last
c. the height of the North Star changes as we travel to different latitudes
d. photographs of the Earth from space always show a round body
e. the Sun is seen blocking different constellations in the course of a year - answer e.
the Sun is seen blocking different constellations in the course of a year

Which ancient Greek thinker suggested (long before Copernicus) that the Earth is
moving around the Sun?

a. Aristotle
b. Aristarchus
c. Eratosthenes
d. Hipparchus
e. Zorba - answer b. Aristarchus

The star that is currently closest to the North Celestial Pole is:

a. Arcturus
b. Betelgeuse
c. Polaris
d. Rigel - answer c. Polaris

As seen from Northern Hemisphere, the Big and Little Dipper

a. are below the horizon throughout the year
b. are at the zenith throughout the year
c. are on the celestial equator throughout the year
d. are in the north circumpolar zone throughout the year - answer c. are on the
celestial equator throughout the year

Where on Earth do stars always circle the zenith (and never rise and set)?

a. at the equator
b. at the north pole
c. at the south pole
d. everywhere
e. nowhere - answer b. at the north pole

We now know that the orbit of a stable planet around a star like the Sun is always in the
shape of:

a. a circle
b. a parabola
c. a straight line
d. an ellipse - answer d. an ellipse

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