Shared Flashcard Set

Details

stellar evolution, galaxies, the universe, solar system
question and answer format
50
Astronomy
Undergraduate 1
08/23/2009

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Cards

Term
Name 2 plutoids
Definition
pluto, Eris and Make Make
Term
How many planets are there?
Definition
eight
Term
Which galaxy is older? E3, Eba, SB3
Definition
E3
Term
How do we know how fast galaxies are moving away from us? How do we know?
Definition
by using the Hubble constant
Term
How many moons does Neptune have?
Definition
13
Term
When light appears to be turning from yellow to green is the planet moving closer or further away from us?
Definition
The planet is moving closer
Term
This type of spectrum is used to determine redshift or blueshift
Definition
Absorption spectrum
Term
What is the math formula used to calculate age of universe
Definition
inverse of the double constant
Term
What phase happens last after the full moon?
Definition
Term
Which Dwarf planet is not in the Kieper belt?
Definition
ceres
Term
When there appears to be the most light on the left side of the moon we say the moon is......
Definition
waning
Term
How far is the moon's orbit off the planetary ecliptic?
Definition
5 degrees
Term
Does the Big Crunch represent an open or closed model for the future?
Definition
Closed
Term
When the the right half of the moon is in darkness, we say the moon is in what phase?
Definition
3rd quarter
Term
A star is giving off light in the green portion of the spectrum. Would green, yellow or orange show faster movement, from green originally?
Definition
Orange
Term
Population 2 stars are formed from....
Definition
hydrogen and helium
Term
When do the highest tides happen?
Definition
When the sun and the moon are in alignment
Term
What are the names of the terrestrial planets?
Definition
Earth,Mercury, Mars, Venus
Term
At what point does the moon appear largest in its orbit?
Definition
Perigee
Term
Does the moon's cycle follow the sidereal or sidonic month?
Definition
The sidonic month
Term
Which 3 galaxies are in our local group?
Definition
Andromeda, Magellica and Milky Way
Term
Is a blueshifting gaalaxy moving towards us or away from us?
Definition
towards us.
Term
How do we determine how fast galaxies are moving away from us?
Definition
Term
If two galaxies are moving at the same speed, what is the color shift?
Definition
There IS no color shift.
Term
At what two phases does sysygy occur?
Definition
ful moon and new moon
Term
How old is the universe?
Definition
approx. 13.7 billion years
Term
A synodic month is how many days long?
Definition
29.3 days long
Term
How far away from us is the Andromeda galaxy?
Definition
2.5 mly
Term
Planetary motion is in which direction when in prograde?
Definition
west to east
Term
E = MC2....what do the letters stand for?
Definition
Energy equals mass x speed squared
Term
A truly dead star is called a .....
Definition
black dwarf
Term
What is the brightest thing in the universe?
Definition
a quasar...it's also very active
Term
Nebula in the HII region are usually
Definition
emission nebula, since the HII region is ionized
Term
Any light that shines from a nebula, most likely comes from what population of stars?
Definition
Term
What is the largest structure in the universe?
Definition
a super cluster
Term
Which of Newton's laws can only be applied to one body?
Definition
Both laws one and two
Term
This term describes one galaxy eating another.
Definition
cannibalilsm
Term
Why are black holes black?
Definition
Due to gravitational pull
Term
What happens before nuclear fusion?
Definition
Gravity pulls things together and heat is generated
Term
When a superior planet moves eastward, it is moving in prograde or retrograde?
Definition
prograde.......remember, eastward means from west to east
Term
What does AU stand for?
Definition
Astronomical unit measuring orbital distance of the sun vs the Earth. You divide to get the distance.
Term
How many foci does an ellipse have
Definition
2
Term
Speed of motion increases or decreases as it approaches perehelion?
Definition
increases
Term
What is Kepler's 3rd law?
Definition
d cubed = p squared
Term
How do we define force?
Definition
Mass - acceleration in Newton's law
Term
What does the law of gravity state?
Definition
Gravitational attraction is directly proportional to distance
Term
When the Andromeda galaxy collides with our galaxy what will happen?
Definition
nothing
Term
What is a protostar?
Definition
an infant star
Term
How many hydrogens are needed to make one helium during nuclear fusion?
Definition
4
Term
What is a nebula made of?
Definition
gas and dust
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