ASTR 1013 FINAL REVIEW : EXAM 1
UTSA FINAL REVIEW FLASH CARDS
Terms in this set (76)
What is the eclipitc plane?
The Plane of the Earth's orbit around the Sun.
When we look at an object that is 1,000 light years away, we see it:
as it was 1,000 years ago.
The cause of the diurnal motion of the stars is the:
Earth's rotation about its axis.
At the summer solstice in San Antonio, the Sun sets
at its northern-most point on the western horizon.
The precession of the earth's rotation axis
is a slow wobble that takes 26,000 years to complete.
means that in AD 14,000. Vega will be a polar star.
How long does it take Earth to complete one orbit around the Sun?
When did humans learn (by a consistent model) that the Earth is not at the center of the universe?
Within the past 600 years.
Seasons on the earth are casued by:
the tilt of the Earth's rotation axis with respect to its orbit.
If you counted one number every second, how long would it take you to count to one trillion?
An annular eclipse is:
a solar eclipse that looks like a ring of light.
The phase of the moon during the lunar eclipse is:
Under the new definition of a Planet issued by the IAU, the reasion that pluto was demoted to Dwarf Planet status was because
it has not cleared its orbit
Suppose its full moon. What phase of the Earth would someone on the moon see at this time?
The highest points on the sky is called the
Planets usually move with respect to the background stars:
in a slow east ward motion
If we have a new moon today, when we will have the next full moon?
In about two weeks
Where will a superior planet in retrograde motion rise?
in the east(just like everything else in the sky).
You are standing at the Earths North Pole. Which direction is Polaris, the North Star?
If the moon rising at about 7am, the phase of the moon must be:
New (or nearly new)
Stellar Parallax is:
a natural consequence of heliocentric model
the apparent angular shift of nearby stars relative to further ones.
What happens during the apparent retrograde motion of the plants?
The planet appears to move westward with respect to the stars over a period of many nights.
The geiocentric model was able to explain:
The apparent lack of motion of the earth.
the daily motion of the stars
the annular motion of the sun.
Which of the following has your "cosmic adress" in the correct order?
you, earth, solar system, milky way, local group, local supercluster.
_____is when a plane is directly between the Earth and Sun.
How did the Ptolemaic model explain the apparent retrograde motion of the planets?
The planets moved along small circles that moved on larger circles around the Earth.
The names of the seven day fo the week are based on:
The seven naked eye objects that appear to move among the constellations.
The Astronomical Unit (AU) is defined as
the average distance between Earth and the Sun.
Which planet was predicted from analyzing small, unexplained motions of Uranus' orbit?
In science, a broad idea that has been repeartedly verified so as to give scientist great confidence that it represents reality is called:
Occam's Razor states that a scientific theory should:
have a minimum number of arbitary assumptions.
What is accuracy a measure of?
The agreement of measurements with accepted values.
What does escape velocity measure?
How fast an object needs to go to espace a planets gravity.
If you were designing a pair of glasses to see animals at ight, you would want the glasses to covert:
infrared photons to optical(visible)photons.
Boice's Comets has been observed in 2013. It was last seen in early 2005 (and not in between). The comet is approximately___ average distance from the Sun.
A car going around a corner at a constant speed:
Accelerates and experiences a force
According to Newton's First Law
A body at rest, tends to stay at rest
a body in motion, tends to stay in motion.
If the distance between two masses is halved, the gravitaional force between:
increases by a factor of four.
An atom that gains or loses electrons is called:
The wavelengh of a wave is
the distance between two adjacent peaks of the wave.
The type of spectrum that we observe from the Sun is:
an absorption line spectrum.
Hot, solid objects:
emit a continuous spectrum at all wavelenghts.
The first major observation that supported the heliocentric model of the solar system and contadicted the geocentric model was:
the phases of Venus.
The wavelenghs of spectral lines emitted from a star that is moving towards us are:
blue shifted towards short wavelenghts.
The most important benefit of a larger telescope aperture is:
increased light gathering power.
What is CCD?
It's an electronic detector that can be used in place of photography for making images.
How many times more light gathering power does a 40 inch refractor have compared to a 5 inch one?
The Chandra Xray Observatory must operate in space because:
X rays do not penetrate Earths atmosphere.
A telescope has an objective lens of 80 inch focal lengh and a 1/2 inch focal length eyepice. What is its magnificaiton?
Suppose you want to observe details on the surface of a distant planet. Which of the following will be most useful to have?
Telescope with high angular resolution.
The annual motion of the Sun relative to the Stars is:
from west to east.
three laws of planetary motion
estimated the size of the Earth by measuring the lenth of shadows between two cities
law of gravity
heliocentric Solar System
formulated the rules of spectroscopic analysis
greates naked eye observer of all time
culmination of the geocentric Solar System
found a shift in the wavelengh caused by the relative motion between the source and observer.
argued that the shape of the earth was spherical
discoved lunar craters and mountains
early model of the atom
precession of Earth's axis
series of hydrogen emissions lines arising from transistions between the second enery level and higher levels.
Constellations through the Sun and planets appear to move are called the _______.
The ________ sphere is the concept of the "bowl of night" that may ancient cultures beliee.
The offical name of the dwarf planet recently discoverd to be the larger than pluto and about twice as far from the sun is ____.
In a ______ reflecting telescope, light comes to a focus behing the hole in the main mirror.
The various forms of elctromagnetic radiation in order of highest to lowest energy are....
gamma rays, x rays, ov, visible, infrared, and radio
Venus shows a full cycle of phases similar to those of the Moon.
Particles of light that carry packet of radiation enery are called photons.
All stars are circumpolar to the equator.
The alt-azimuth mounting aligns one axis of a telescope with teh celestral pole.
An equinox occurs when the apparent path of the Sun crosses the celestial equator.