Term
| T/F: A lunar eclipse can occur only during the full phase |
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Definition
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Term
| T/F: The solar day is longer than the sidereal day |
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Definition
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Term
| T/F: The angular diameter of an object is inversely proportional to its distance from the observer |
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Definition
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Term
| T/F: If we know the distance of an object from Earth, we can determine the object's size by measuring its parallax |
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Definition
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Term
| T/F: The seasons are caused by the precession of the Earth's axis |
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Definition
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Term
| If Earth rotated twice as fast as it currently does, but its motion around the Sun stayed the same, then |
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Definition
| The night would be half as long |
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Term
| The number 6.7 x 10^5 can be represented in several different ways: Pick all which are correct |
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Definition
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Term
| Constellations on star charts do not look the same as they do in the sky. Using this photograph, identify the constellation |
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Definition
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Term
| T/F: The heliocentric model of the universe holds that Earth is at the center and everything else moves around it |
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Definition
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Term
| T/F: The speed of a planet orbiting the Sun is independent of the planet's position in the orbit |
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Definition
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Term
| T/F: You throw a baseball to someone; before the ball is caught, it is temporarily in orbit around the Earth's center |
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Definition
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Term
| T/F: Aristotle proposed that all planets revolve around the Sun |
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Definition
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Term
| T/F: Copernicus's theories gained widespread scientific acceptance during his lifetime |
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Definition
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Term
| The figure above, showing the motion of a ball near Earth's surface, depicts how gravity |
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Definition
| Causes the ball to accelerate downward |
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Term
| How long would a radar signal take to complete the round-trip between Earth and Mars when the planets are .4 AU apart? |
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Definition
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Term
| T/F: As you drive away from a radio transmitter, the radio signal you receive from the station is shifted to longer wavelengths |
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Definition
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Term
| Imagine an emission spectrum produced by a container of hydrogen gas. Changing the amount of hydrogen in the container will change the colors of the lines in the spectrum. |
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Definition
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Term
| The wavelength of green light is about the size of an atom. |
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Definition
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Term
| Imagine an emission spectrum produced by a container of hydrogen gas. Changing the gas in the container from hydrogen to helium will change the colors of the lines in the spectrum. |
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Definition
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Term
| An electron moves to a higher energy level in an atom after absorbing a photon of a specific energy. |
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Definition
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Term
| A star much cooler than the Sun would appear |
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Definition
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Term
| An x-ray telescope located in Antartica would not work well because of |
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Definition
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Term
| What is the wavelength of a 85-MHz radio signal? |
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Definition
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Term
| T/F: The main advantage to using the HST is the increased amount of "nighttime" viewing it affords |
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Definition
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Term
| T/F: Radio telescopes are large in part to improve their angular resolution, which is poor because of the long wavelengths at which they are used to observe the skies. |
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Definition
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Term
| T/F: Infrared astronomy can only be done from space. |
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Definition
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Term
| T/F: Because gamma-rays have very short wavelengths, gamma-ray telescopes can achieve extremely high angular resolution |
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Definition
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Term
| T/F: The term "seeing" is used to describe how faint an object can be detected by a telescope. |
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Definition
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Term
| The main reason that professional research telescopes are reflectors is that |
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Definition
| large mirrors are easier to build than large lenses |
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Term
| T/F: The solar system is of largely uniform composition |
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Definition
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Term
| T/F: The largest planets also have the largest densities |
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Definition
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Term
| T/F: Asteroids, meteoroids, and comets are remnants of the early solar system |
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Definition
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Term
| T/F: Most comets have short periods and orbit close to the ecliptic plane |
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Definition
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Term
| T/F: Asteroids were recently formed by the collision and breakup of an object orbiting in the asteroid belt |
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Definition
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Term
| In the leading theory of solar system formation, the planets |
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Definition
| former from the same flattened, swirling gas cloud that formed the Sun |
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Term
| According to the figure above, the temperature in the solar nebula at the location now at the center of the asteroid belt is |
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Definition
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Term
| T/F: Like Earth, the Moon has a molten core |
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Definition
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Term
| T/F: Motion of the crustal plates is driven by convection in Earth's upper mantel |
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Definition
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Term
| T/F: Except for the layer fair closest to the Earth's surface, the ozone layer is the warmest part of the atmosphere |
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Definition
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Term
| T/F: Because of tidal forces, the Moon is in a synchronous orbit around the Earth |
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Definition
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Term
| T/F: Luna maria are extensive lava-flow regions |
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Definition
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Term
| Sunlight absorbed by Earth's surface is reemitted in the form of |
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Definition
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Term
| The most likely theory of the formation of the Moon is that it |
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Definition
| formed from a collision of Earth with a Mars-sized object |
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Term
| According to the figure above, commercial jet airplanes flying at 10 km are in |
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Definition
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Term
| T/F: Evidence of lava flows is common on the surface of Venus |
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Definition
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Term
| T/F: There is strong circumstantial evidence that active volcanism continues on Venus |
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Definition
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Term
| T/F: Mars has the largest volcanoes in the solar system |
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Definition
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Term
| T/F: Numerous surface features on Venus can be seen in Earth-based images made in the ultraviolet part of the spectrum |
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Definition
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Term
| T/F: There are many indications of plate tectonics on Mars |
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Definition
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Term
| Mercury's large overall density suggests that the planet |
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Definition
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Term
| Venus's surface is permanently obscured by clouds. As a result, the surface has been studied primarily by |
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Definition
| orbiting satellites using radar |
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Term
| In terms of area, the extinct Martian volcano, Olympos Mons, is about the size of |
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Definition
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Term
| In the figure above (planetary radar for a rotating planet), the highest-frequency reflected radiation is received from |
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Definition
| the upper part of the planet |
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Term
| T/F: Storms in the jovian planets' atmospheres are generally much longer lived than storms on Earth. |
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Definition
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Term
| T/F: The element helium plays an important role in producing Saturn's atmospheric colors. |
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Definition
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Term
| T/F: Around northern midsummer on Uranus, an observer near the north pole would observe the Sun high and almost stationary in the sky. |
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Definition
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Term
| T/F: The solid surface of Jupiter lies just below the cloud layers that are visible from Earth. |
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Definition
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Term
| T/F: Jupiter emits more energy than it receives from the Sun. |
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Definition
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Term
| The main constituent of Jupiter's atmosphere is |
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Definition
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Term
| Compared to Earth, Saturn's core is roughly |
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Definition
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Term
| T/F: There are as many absorption lines in the solar spectrum as there are elements present in the Sun. |
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Definition
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Term
| T/F: Neutrinos have never been detected experimentally. |
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Definition
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Term
| T/F: Flares are caused by magnetic disturbances in the lower atmosphere of the Sun. |
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Definition
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Term
| T/F: The most abundant element in the Sun is hydrogen. |
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Definition
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Term
| T/F: The density and temperature in the solar corona are much higher than in the photosphere. |
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Definition
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Term
| The Sun spins on its axis roughly once each |
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Definition
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Term
| Solar energy is produced by |
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Definition
| fusion of light nuclei into heavier ones. |
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Term
| The time between successive sunspot maxima is about |
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Definition
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Term
| In the standard solar model of the Sun's interior, as the distance from the center increases, |
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Definition
| the density decreases faster than the temperature |
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Term
| The star Betelgeuse is 4.25 x 10^2 light years away. How long would it take for a radio signal to reach us from a civilization on a planet circling the star? |
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Definition
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Term
| From a distance of 1 parsec, the angular size of Earth's orbit would be |
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Definition
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Term
| How many radians are in 9"? |
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Definition
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Term
| How far away (in parsecs) is a star whose parallax is 0.0214"? |
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Definition
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Term
| How far away (in lightyears) is a star whose parallax is 0.0115"? |
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Definition
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Term
| A star has apparent magnitude 12.5 and absolute magnitude 4. How far away is it (parsecs)? |
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Definition
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Term
| T/F: The radius of a star can be determined if the star's distance and luminosity are known |
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Definition
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Term
| T/F: Red giants are very bright because they are extremely hot. |
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Definition
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Term
| T/F: Star A appears brighter than star B, as seen from Earth. Therefore star A must be closer to Earth than star B. |
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Definition
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Term
| T/F: There are no billion-year-old main-sequence O- or B-types stars |
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Definition
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Term
| T/F: A star of apparent magnitude +5 looks brighter than one of apparent magnitude +2 |
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Definition
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Term
| Stars of spectral class M do not show strong lines of hydrogen in their spectra because |
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Definition
| their surfaces are so cool that most hydrogen is in the ground state. |
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Term
| Compared with a star of absolute magnitude -2 at a distance of 100 pc, a star of absolute magnitude 5 at a distance of 10 pc will appear |
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Definition
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Term
| T/F: The formation of the first high-mass stars in a collapsing cloud tend to inhibit further star formation within the cloud. |
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Definition
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Term
| T/F: Interstellar matter is quite evenly distributed throughout the Milky Way Galaxy. |
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Definition
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Term
| T/F: Twenty-one-centimeter radiation can be used to probe the interiors of molecular clouds. |
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Definition
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Term
| T/F: Emission nebulae radiate mainly in the ultraviolet part of the electromagnetic spectrum. |
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Definition
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Term
| T/F: Brown dwarfs take a long time to form, but will eventually become visible stars on the lower main sequence. |
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Definition
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Term
| The red glow of an emission nebula |
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Definition
| is produced by hydrogen gas heated to high temperatures by massive stars within the nebula. |
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Term
| Of the following telescopes, the one best suited to observing dark dust clouds is |
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Definition
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Term
| A protostar that will eventually turn into a star like the Sun is significantly |
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Definition
| more luminous than the Sun. |
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Term
| In the figure above (Newborn Star on the H-R Diagram), as the star moves from stage 6 to stage 7 it becomes |
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Definition
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Term
| According to the figure, compared to Proxima Centauri, Barnard's Star must be |
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Definition
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Term
| T/F: Nuclear fusion in the core of a massive star can not create elements much heavier than iron. |
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Definition
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Term
| T/F: Because of stellar nucleosynthesis, the spectra of old stars show more heavy elements than those of young stars. |
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Definition
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Term
| T/F: A planetary nebula is the disk of matter around a star that will eventually forma a planetary system. |
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Definition
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Term
| T/F: It takes less and less time to fuse heavier and heavier elements inside a high-mass star. |
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Definition
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Term
| T/F: The Sun will get brighter as it begins to run out of fuel in its core. |
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Definition
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Term
| A star like the Sun will end up as a |
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Definition
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Term
| A white dwarf is supported by the pressure of tightly packed |
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Definition
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Term
| Most of the carbon in our bodies originated in |
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Definition
| the core of a red giant star. |
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Term
| T/F: Herschel's attempt to map the Milky Way by counting stars led to an inaccurate estimate of the Galaxy's size because he was unaware of absorption by interstellar dust. |
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Definition
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Term
| T/F: Globular clusters trace out the structure of the Galactic disk. |
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Definition
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Term
| T/F: Cepheid variables can be used to determine distances to the nearest galaxies. |
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Definition
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Term
| T/F: Stars and gas in the Galactic disk move in roughly circular orbits around the Galactic center. |
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Definition
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Term
| T/F: The Galactic disk contains only old stars. |
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Definition
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Term
| Most of the mass of the Milky Way exists in the form of |
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Definition
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Term
| Stars in the outermost regions of the Milky Way |
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Definition
| orbit faster than astronomers would expect based on the Galactic mass we see. |
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Term
| In the figure above, a Cepheid variable star with luminosity 1000 times that of the Sun has a pulsation period of roughly |
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Definition
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Term
| The figure above tells us that |
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Definition
| far from the center, the Galaxy rotates more rapidly than we would expect based on the light that we see. |
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Term
| T/F: Most elliptical galaxies contain only old stars. |
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Definition
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Term
| T/F: Active galaxies can emit thousands of times more energy than our own galaxy. |
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Definition
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Term
| T/F: Most galaxies are receding from the Milky Way. |
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Definition
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Term
| T/F: Type I supernova can be used to determine distances to galaxies. |
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Definition
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Term
| T/F: Hubble's Law can be used to determine distances to the farthest objects in the universe. |
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Definition
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Term
| T/F: Most galaxies are spirals like the Milky Way. |
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Definition
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Term
| T/F: Irregular galaxies, though small, often have lots of star formation taking place in them. |
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Definition
|
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Term
|
Definition
| the greater the distance to a galaxy, the greater is the galaxy's redshift. |
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Term
| Within 30 Mpc of the Sun, there are about |
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Definition
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Term
| T/F: The theory of inflation predicts that the density of the universe is exactly equal to the critical density |
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Definition
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Term
| T/F: The microwave background radiation last interacted with matter around the time of decoupling. |
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Definition
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Term
| T/F: If the universe had an edge, that fact would violate the assumption of isotropy in the cosmological principle. |
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Definition
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Term
| T/F: Hubble's Law implies that the universe will expand forever. |
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Definition
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Term
| T/F: The cosmological redshift is a direct measure of cosmic expansion. |
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Definition
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