You are on a strange planet. You note that the stars do not rise and set, but circle around parallel to the horizon. Then you travel over the surface of the planet in a straight parallel line until you reach a place where you observe the stars rise and set perpendicular to the horizon. If the distance that you traveled between these two points is 6,500 miles, what is the circumference of the planet?
An observer located on the equator of the Earth notes one day that the center of the Sun crosses the meridian precisely 23.5 degrees north of the zenith. Therefore, the date is most likely
The main reason for it being hotter in summer than in winter is
the Sun is higher in the sky in the summer.
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.
Relative to the stars, a planet in retrograde motion moves __________ from one night to the next.
toward the west
We live at 40° north latitude in Provo. How often is the Sun directly overhead at noon in Provo?
What was the major contribution made by Nicolaus Copernicus to astronomy?
He said that the Earth is not the center of the Universe.
What major contribution to astronomy was made by Tycho Brahe?
He made extensive and detailed observations of the positions of the planets.
What was the major contribution made to astronomy by Johannes Kepler?
He discovered that the planets move around the Sun in elliptical orbits.
What was one of the major contributions made by Isaac Newton to astronomy?
He developed a theory of gravity that could explain orbital motion.
Which of the following is a problem inherent to individual radio telescopes?
They have poor angular resolution.
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.
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:
If an object is moving away from you, what effect do you observe in the object's spectrum?
it appears red-shifted.
What is the primary advantage of the Hubble Space Telescope over ground-based telescopes?
It is above the atmostphere
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 telescope of large aperture is better than one of small aperture because of
greater resolving power
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.
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 =
The light we see from the visible surface of the Sun comes from which atmospheric layer?
If you view a typical star with a spectrograph, what type of spectrum are you likely to observe?
The absolute magnitude of a star is defined to be the apparent magnitude that the star would have if it were at a standard distance of ___ parsec(s).
What is the average length of time from one time of sunspot maximum on the Sun until the next time of sunspot maximum?
Which two physical properties contribute to the observed absolute magnitude or luminosity of an object?
surface temperature and size
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 result does the Greenhouse Effect have on the surface environment of Venus?
It has raised the surface temperature by hundreds of degrees Celsius
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.