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Planetary and Stellar Astronomy: Test 2
Terms in this set (32)
A telescope that uses lenses to gather and collect light is a...
The two most important properties of any telescope are...
the light gathering power and the resolving power
The CCD (charge-coupled device) is an
array of small light-sensitive cells that can be used in place of photographic film to obtain a picture
A spectrograph is usually used in astronomy to measure the...
distribution of light among the various colors
In our solar system, which of the following planets if not a member of the terrestrial group?
Jupiter, Saturn, Uranus
Which planets have a greenhouse effect?
Venus and Mars
Which is the correct sequence?
Inner planets, asteroid belt, outer planets, Kuiper belt, Oort Cloud
Together, hydrogen and helium account for what percentage of the total mass of all matter in the universe?
The age of the solar system has been dated rather precisely to 4.56 billion years. What method was used to determine this number?
Determining the age of meteorites by radioactive dating
The Kepler space telescope, which holds the record for observing evidence for the largest number of exoplanets, use this technique:
The composition of the Earth's atmosphere today is about...
1% carbon dioxide and other gases
The Van Allen belt are...
regions of high-energy charged particles trapped within Earth's magnetosphere
The presence of oxygen in Earth's atmosphere is thought to result directly from what type of process?
biological activity of plants and animals
Which best explains the creation of the lunar maria?
Craters flooded by massive magma flows
Moon quakes occur most often when the Moon is near perigee. The reason for this is...
increased tidal distortion of the Moon by Earth
Which of the following theories for the origins of the Moon is generally accepted by astronomers?
The Moon is the result of a collision between the Earth and a Mars sized object in the early days of the solar system
What evidence would a planetary geologist use to identify a "young" crater on Mercury?
Few if any small craters within it or on its rim
The reason Venus has very few impact craters compared to the Moon is believed to be that...
lava flows have covered all but the most recent craters
What effect causes the seasonal variation in color and shading of parts of the Martian surface?
changes in dust covering in response to wind storms
Compared to the mass of Earth, the mass of Jupiter is...
about 300 times larger
The low average density of Jupiter indicates that this planet is composed mainly of...
hydrogen and helium, in liquid or gaseous form
The physical structure of Saturn's rings is...
a sequence of many hundreds of separate rings made of ice and rock particles
The four giant moons of Jupiter were discovered by...
The three outer Galilean satellites of Jupiter (Europa, Ganymede, and Callisto) all appear to have cores of rock. In addition to rocky material, the major constituent of these satellites seems to be ices of...
The most active volcanic object in the solar system is...
Io, the inner Galilean moon of Jupiter
Titan is a satellite of Saturn. It is unusual among all the planetary moons because of its...
When light passes through a transparent material and bends like in the lens, the effect is known as...
The terrestrial planet closest in size to Earth is...
The two main surface regions on the Moon are maria and...
the idea that the solar system formed from a diffuse, roughly spherical, rotating cloud of gas and dust is called the...
the Caloris Basin is a surface feature of...
The effect that gives planets with a liquid conducting core a magnetic field is called a...