-
The horns of the crescent moon always point
*away* from the Sun
-
An arc second is a measure of
angle
-
At what approximate value of declination is the Sun on March 21 this year?
0 degrees
-
The main reason for it being hotter in summer than in winter is
the Sun is higher in the sky in the summer.
-
The Zodiac is
the constellations through which the Sun appears to travel in one year.
-
What is the range of values that the celestial coordinate declination can have?
-90 to +90
-
Polaris is presently the pole star, but it will not always be the pole star because the actual celestial pole moves among the stars due to the _________ of the Earth.
revolution
-
Relative to the stars, the moon moves __________ from one night to the next.
to the east
-
Green light is of than blue light:
LOWER frequency, LONGER wavelength
-
An eclipse of the moon can occur only when the moon is at
full moon
-
Relative to the stars, a planet in retrograde motion moves __________ from one night to the next.
to the west
-
What happens in our model of the atom when an emission line is formed?
An electron moves from a higher energy level to a lower one.
-
A body is heated until it appears red in color. It is then heated further until it appears bluish in color. The amount of red light it gives off as the body becomes blue......
increases
-
If an object is moving toward you, what effect do you observe in the spectrum of that object?
it appears blue-shifted
-
Kepler's second law states that a planet moves fastest when it....
is closest to the Sun
-
The path that the Sun follows through the stars on the celestial sphere is known as
the ecliptic
-
Measured the circumference of the Earth well over a century before the birth of Christ
Eratosthenes
-
Made very precise observations of planetary positions just before the use of the telescope
Tycho
-
Was the first person to observe the phases of the planet Venus
Galileo
-
Analyzed the motions of the planets and discovered that orbits were ellipses rather than perfect circles
Kepler
-
The first to use a telescope astronomically and discover the moons of Jupiter
Galileo
-
The correct order of appearance of the following “actors” on the “stage of scientific discovery” is
Ptolemy, Copernicus, Kepler, Newton, Einstein
-
What happens in our model of the atom when an absorption line is formed?
An electron moves from a lower energy level to a higher one.
-
What is the primary advantage of the Hubble Space Telescope over ground-based telescopes?
It is above the atmosphere
-
The orbit of the Earth about the Sun defines a plane in space. The orbital plane between the Earth and Sun is referred to as the
ecliptic
-
Blue light is of than green light:
higher frequency and shorter wavelength
-
If a telescope with an objective focal length of 5-feet is used with an eyepiece of 1/2 inch focal length, the resulting magnification will be
10x
-
What is the principal advantage that orbiting observatories such as the Hubble Space Telescope have over ground-based telescopes?
It is above the atmosphere and can see electromagnetic radiation that does not reach the ground.
-
***What happens in our model of the atom when an emission line is formed?
An electron moves from a higher energy level to a lower one.
-
The series of lines in the spectrum of hydrogen known as the Balmer series are seen in the visible portion of the spectrum and are characterized by electron transitions up from or down to the level n =
n = 2
-
At new moon the Earth would appear to an observer on the Moon to be at which phase?
Full
-
What major contribution to astronomy was made by Tycho Brahe?
He made extensive and accurate naked-eye observations of the positions of the planets.
-
Polaris, the North Star, does not appear to move in the sky because
it lies approximately over the northern axis of the Earth.
-
Declination is usually measured north and south from the celestial equator in units of
degrees
-
A hydrogen atom usually consists of:
one electron and a proton
-
When Venus has an elongation that is 20 degrees westward from the Sun, it is then visible
as a morning star
-
Two forms of electromagnetic radiation that easily penetrate Earth’s atmosphere are
visible light and radio waves
-
What was the major contribution made by Nicolaus Copernicus to astronomy?
He said that Earth might not be the center of the universe
-
The celestial figure known as the Great Square is found in the constellation of
Pegasus
-
Orange light is of _________ than violet light
lower frequency and longer wavelength
-
Although the stellar constellations are of very ancient origin, they still are useful to modern astronomers
for identifying stars and designating locations on the sky
-
What was the major contribution made to astronomy by Johannes Kepler?
He discovered that the planets move around the Sun in elliptical orbits.
-
The declination of the north celestial pole is
90 degrees
-
On September 21, the right ascension of the Sun is about
12 hours.
-
What type of spectrum is seen as light from a hot blackbody source passes through a cooler cloud of gas?
absorption line
-
***The horns of the crescent moon always point
away from the Sun
-
You live at 40° north latitude. How often is the Sun directly overhead at noon in your hometown?
never
-
***If an object is moving toward you, what effect do you observe in the spectrum of that object?
It appears blue-shifted
-
If a telescope with an objective lens of 10-foot focal length is used with an eyepiece of 1/4 inch focal length, the resulting magnification will be
480x
-
***The Zodiac is
the constellations through which the Sun appears to travel in one year
-
Pluto is not a Jovian planet because
it is more like an icy moon and no longer considered a planet.
-
Which of the following are the terrestrial planets?
Mercury, Venus, Earth, Mars
-
**What is the range of values that the celestial coordinate declination can have?
-90 to +90
-
Which of the following are the Jovian planets?
Jupiter, Saturn, Uranus, Neptune
-
How do the densities of the terrestrial and Jovian planets compare?
The terrestrial planets have higher densities than the Jovian planets.
-
Which of the following defines density?
Mass divided by volume
-
The percentage of light reflected by a planet or other object is known as
its albedo
-
What is the primary ingredient in the atmosphere of Venus?
Carbon dioxide
-
What is the primary ingredient in the Earth's atmosphere?
Nitrogen
-
The average rate of erosion on the Moon is far less than that on the Earth because
the Moon lacks an atmosphere and free water.
-
What is the primary ingredient in the atmosphere of Mars?
Carbon dioxide
-
Venus has a feature named Aphrodite Terra. What is this feature?
A continental-sized plateau
-
What result does the greenhouse effect have on the surface environment of Venus?
It has raised the surface temperature by hundreds of degrees Celsius
-
The atmosphere of Mercury can best be described as being
essentially absent.
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