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The outermost part of the Suns atmosphere is the _______.
Corona
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Two elements make up the sun. What are these elements and which one is more abundant?
Hydrogen and Helium; Hydrogen is the most abundant.
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Small regions of the Suns surface that are seen to have a north and south magnetic pole are__________.
Sunspots
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Another name for the northern lights is the ___________.
Aurora
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What events is most likely to immediately follow an active sunspot?
Coronal Mass Ejections
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25% of the sun is made up of what?
Helium
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How is the Aurora on Earth created?
The charged particles from the Sun interacting with the Earths magnetic field.
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The solar wind from the Sun interacts with the Earths magnetic field to produce what?
D. All of the Above
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What are the cooler parts of the photosphere caused by the higher magnetic fields?
Sunspots
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Einstein found our universe has 4 dimensions he called ______.
time
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The region around a black hole where no escape is possible is called the ____ _____.
event horizon
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When looking for black holes, what do astronomers usually look for?
A binary star system where the black hole is interacting with its companion
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What is the volume of a black hole?
zero
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A star that collapses with such mass that not even neutron degeneracy can hold up its weight will become a ____ _____.
black hole
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What idea would Einstein and Newton disagree on?
that mass can bend light
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At the event horizon of a black hole, what is the value for the escape velocity?
The speed of light
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When looking for black holes the emission of _____ from a companion star is sometimes a tell-tale sign of the black hole's existence?
x-rays
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When will our Sun become a black hole?
Never
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That radius from an object where the escape velocity equals the speed of light is called the ______ radius
schwarzschild
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What 'new' technique is being employed to detect black holes?
Looking for gravity waves
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According to Einstein, how could you remove the affects of gravity?
By falling
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In the equation, E=MC2, what does the "M" stand for?
Mass
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A proposal during the 19th century to explain how the Sun burns was:
Chemical burning
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All stars get their energy by _____.
nuclear fusion
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What 2 forces are in balance near the Sun's surface?
gravitational and pressure
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The type of heat transfer that occurs through the movement of fluids is called
convection
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The first process of the P-P cycle fuses two hydrogens to form
D. All of the above
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Order the classes from hottest to coldest O-T
O B A F G K M L T
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A star without sodium lines in its spectrum likely
is too hot to indicate any sodium lines.
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The color of a star can give you information on the star's _______.
Temperature
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Which one of the following stars would have a higher surface temperature?
blue star
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How could you tell from Earth if a distant star had a fast spin?
the spectral lines would be much thicker
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"Proper velocity" refers to motion
perpendicular to us.
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"Radial velocity" refers to motion
towards or away from us
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What spectral class is our Sun?
G2V
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Cierto or Verdad:
A Light year is longer than a persec.
FALSO BITCH!
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The distance light travels in one year (5,900,000,000,000 miles) is also called a
(buuzzzzz) LIGHT YEAR!!!!
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What important measurement did RR-Lyrae Variables allow astronomers to get?
Luminoscity
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How is a 'parsec' defined?
A parallax of 1 arcsecond if an observer moves 1 AU
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When determining distances to celestial objects beyond 300 light years, what technique is often employed?
Correlation using the H-R diagram
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What balances the gravitational force of a star on the Main Sequence?
pressure
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A K type star will have a ____ compared to our Sun.
longer life
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Why is a red giant cooler than when it was on the main sequence?
it is much bigger so heat from fusion is spread out
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As our Sun ages, how will it move along the Main Sequence line?
slightly to the right (cooler) and upward (more luminous)
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Where did the carbon in your body come from?
star*
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The Triple-Alpha process
occurs at much higher temperatures than hydrogen to
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A protostar with a lot of initial mass will fall onto the main sequence ______ and begin at a ______ temperature.
quickly ... high
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What kind of planet would you expect to find the most volcanic activity after a long period of time?
The larger terrestrial planets
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Where would you expect to find planets rich in ammonia in another solar system?
Much further away from the star where it is very cold
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True or False: With only a few exceptions, astronomers had found extrasolar planets identical to what they predicted?
False with F as in FUCK this!
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What would make a nebula spin faster?
Conservation of angular momentum demands it if the disk shrinks
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What percentage of stars that astronomers are investigating contain planets?
only about 15 percent
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Outflow jets from the poles of a protostar are also called
stellar wind.
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What feature about electrons causes degenerate stars?
Two electrons cannot occupy the same place at the same time
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An explosion caused by the sudden collapse of matter within the core of a massive star..............
supernova
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T or F: All pulsars are neutron stars.
True bitchhhhh
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Atoms heavier than iron are made in ______.
Supernova
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