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Astronomy Semester 2 final

Terms in this set (114)

The solar system started as a nebula
True
Every majoy planet has moons
False
Puto-Charon can be considered a binary planet system
True
Planets closest to the sun have the shortest rotational period
False
Saturn is the only planet with a ring system
False
Asteroids are only found in the asteroid belt
false
Planets closest to the sun have the shortest revolution period
true
The earth's surface features never change
false
Earth is the only object in the solar system with water
false
Science fiction never sets stories in the solar system
false
Which planet is closest in size to earth
Venus
The main reason Pluto is no longer considered a major planet is
It has not cleared its orbit
Planets orbit in the same direction around the sun due to conservation of
Angular momentum
Which is not a moon of jupiter
Titan
The most common element in the Earth is
Iron
Which planet other than Earth has evidence of running water
Mars
The glowing head of a comet is called the
Coma
Which was the first dwarf planet discovered
Ceres
The densest planet is
Earth
Comets are mostly made of
Ice
The atmosphere of Jupiter is mostly composed of
Hydrogen and Helium
Who discovered Pluto
Clyde Tombaugh
The most common gas in the Earth's atmosphere is
Nitrogen
Gas giants are ______ compared to a terrestrial planet
bigger
Long period comets are thought to come from
oort cloud
Why does the moon have more impact craters than the Earth
The moon has little or no weathering
Scientists suspect there might be another majoy planet past Neptune. This planet is called
Planet 9
The age of the Earth is thought to be
4.6 Billion years
The inner and outer solar system is seperated by
The asteroid belt
Which movie is not set in our solar system
Star wars
largest radius
jupiter
Shortest year
mercury
least dense
saturn
smallest radius
mercury
longest day
Venus
longest year
Neptune
Most known moons
Jupiter
Hottest average Temp
Venus
Giant red spot
Jupiter
Runaway greenhouse effect
Venus
Extensive ring system
Saturn
Virtually no atmosphere
mercury
backwards rotation
mercury
sideways rotation
uranus
life
Earth
Our sun mostly changes hydrogen to helium
true
Only high mass stars turn into Red Giants
False
Only light can escape from inside the event horizon of a black hole.
false
Red Giants and White Dwarfs were once on the main sequence
true
black holes were predicted by Einsteins's theory of Relativity
True
Since our sun is the brightest in the sky, high mass star
False
Exoplanets are found in our solar system
False
Planetary nebulas turn into protostars
False
High solar activity can disrupt Earth communications
True
Which best determines the temp of a star
Color
In a star hydrostatic equilibrium requires a balance between
pressure and gravity
the space between stars is called
interstellar
Nuclear fusion begins in a star because of
...
Which agency can officially name stars
IAU
Which element inside a high mass star can not undergo nuclear fusion
Iron
Sunspots are caused by _____ fields
Magnetic
O-type stars are which color
Blue
The first exoplanet discovered was
51 Pegasi B
Our sun is which type of star
G
The spectral classification of a star (O, B, A, ...) tells us mainly about the star's
Temperature
Which of the following has the objects correctly ranked, from largest to smallest.
Red giant, Sun, white dwarf, singularity
Gold (which is heavier than iron) in that piece of jewelry you're wearing originated where
in fusion reactions that occur during supernova explosions
Energy is transported from the core to the surface of the sun by means of
Radiation and Convection
Which of the following is not undergoing nuclear fusion
Brown dwarf
The rate of which any star proceeds through the stages of its life "Evolves" is determined by
its mass
The space telescope that has discovered the most exoplanets is
Kepler
The first black hole discovered was
Cygnus X-1
Star A has an absolute magnitude of +3.2 Star B has an absolute magnitude of +5.7. Which is true?
A is brighter than B
Intermediate mass stars end up as
...
Center of the sun; nuclear fusion
Core
Inner layer; stable plasma
Radiation zone
Outer layer; turbulent
Convection zone
Surface of sun; solar activity
photosphere
Atmosphere of sun emits UV radiation
Chromosphere
Einstein's general relativity predicted many future cosmological discoveries
true
Galaxies moving away from us are blue shifted
False
Shapley clearly won the great debate of 1920
False
Dark energy is thought to be causing the universe to accelerate
true
Drakes equation is used to predict the expansion of the universe
False
Dark energy and Dark Matter make up most of the mass of the universe
Tru
Superclusters are linked by gravity
False
It is thought that the four fundamental forces were one in the first instant of the big bang
True
We have definitive proof that there is life in the universe
True
We have definitive proof that aliens have landed on earth
Fals
What type of galaxy is the Milky way
Barred spiral
There are how many stars in a galaxy
Billions
What is the correct order of the objects from smallest to largest
Solar system, galaxy, universe
We live in the ______ galaxy
Milky Way
At the center of most, if not all galaxies is a
Giant black hole
_____ galaxies can form when two other galaxies collide
A peculiar galaxy
What do astronomers infer from the motion of distant galaxies
The universe is expanding
In the raisin bread analogy for the universe, what to the raisins represent
Galaxies
If you look outside at night to see a galaxy it is
Very hard because they look like stars
At the center of our solar system is
a star
What are galaxies categorized by
Shape
How can one explain the fact that nearly all other galaxies appear to be moving farther away from us
The universe is expanding
How can Edwin Hubble's discoveries be summarized
There are galaxies outside of our own Milky Way, and nearly all of them are getting further away
What evidence supports the big bang
The cosmic redshift, quasars, the cosmic microwave background radiation
The term big bang theory basically refers to what
the sudden expansion of the universe from a hot, dense state
The creation of atomic nuclei occured during
nucleosunthesis
Recently confirmed, what are produced by rotating pairs of black holes?
Gravity waves
Who added the cosmological constant to support the steady state universe
einstein
Which of the following is Earth not a member of
Andromeda
On the cosmic Calendar, human history has existed for
Minutes
Big BAng; Inflation; Nucleosynthesis
Primordial Era
Stars are formed; structure; current age
Stelliferous Era
All stars die out; matter decays
Degenerate Era
Only black holes remain
Black hole era
Entropy; nothing
Dark Era
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