Quiz 1 Astronomy Essay
Suppose we imagine the Sun to be about the size of a grapefruit. How bug an area would the orbits of the nine planets of the Solar System cover?
The size of a typical campus
What is Nuclear Fusion?
The process of combining lightweight nuclei to make heavier nuclei
On the cosmic calendar, in which the history of the universe is compressed into 1 year, when did Kepler and Galileo first discover that we live on a planet in the solar system?
1 second ago
On a scale in which the distance from the Sun to Earth is about 15 meters, the distance from Earth to the Moon is
Small enough to fit within your hand
A typical galaxy is a
Collection of a few hundred million to a trillion or more stars, bound together by gravity.
Our solar system consists of
the Sun and all the objects that orbit it
How long does it take Earth to complete one orbit around the Sun?
The term observable universe refers to
That portion of the universe that we can see in principle, given the finite ago of the universe.
How are galaxies important to our existence?
Galaxies recycle material from one generation of stars to the next, and without this recycling we could not exist.
Which is the largest planet in our solar system?
Why were ancient peoples unable to detect stellar parallax?
They did not have the ability to measure very small angles.
If the Moon is setting at 6 A.M., the phase of the Moon must be
Orion is visible on winter evenings but not summer evenings because of
The location of Earth in its orbit.
During a planet’s period of apparent retrograde motion (as seen from earth),
For a few weeks or months, the planet moves westward relative to the stars, rather than the usual eastward relative to the stars.
We describe a location on Earth’s surface by stating its
Latitude and longitude.
What do we mean when we talk about the “Milky Way” in our sky?
We mean the patchy band of light that represents what we see when we look into the plane of the Milky Way Galaxy.
Which of the following best describes why we have seasons on Earth?
The tilt of Earth’s axis causes different portions of Earth to receive more or less direct sunlight at different times of the year.
How does Earth’s varying distance from the Sun affect our seasons?
It doesn’t – Earth’s orbital distance plays no obvious role in seasons.
All of the following statements are true. Which one explains the reason that there is not a solar eclipse at every new moon?
The orbital plane of the moon is tilted slightly (by about 5 degrees) to the ecliptic plane.
Why is it warmer in the summer than in the winter?
Light from the sun is concentrated over a smaller area since it is higher in the sky.