Final Flashcards
astronomy
What is the Solar System?
everything that orbits the sun
What are the inner planets composed of?
Rock (they are smaller)
List the inner planets
MY VERY EAGER MOTHER
Mercury
Venus
Earth
Mars
What are the outer planets composed of?
Gas (giants)
they are the bigger planets
list the outer planets
JUST SERVED US NOODLES
Jupiter
Saturn
Uranus
Neptune
What is the rotation time for mars?
24 1/2 hours
What is the rotation time for Jupiter?
10 hours
How does Uranus rotate?
ON ITS SIDE
1 day on _____ is longer than its year?
Venus
How many earth days does it take Venus to rotate?
243
How many earth days does it take Venus to orbit?
225
What is a comet?
Described as a dirty snowball (ice and dust)
What is Solar Wind?
It is a flow of ions flowing from the sun
How can solar wind effect a comet?
It causes the tail of comet to flow back away from the sun
What is an oort cloud?
Chunks of ice. Where the comets live.
What is a meteoroid?
Rock fragments in space
What is a meteor?
“Shooting Star”
-a rock or grain of sand entering our atmosphere.
What is a meteorite?
A rock fragment that strikes the earth
What is mercury?
It is the smallest planet closest to the sun
NO ATOMOSPHERE
NO MOONS
What is Venus?
atmosphere?
temp?
size?
rotation direction?
sister planet?
moons?
wind speed?
-2nd planet closest to the sun—- brightest planet closest to us.
-earths sister planet
-350 km winds
-NO MOONS
-has a and evening star
-Atmosphere = CARBON DIOXIDE
-HOTTEST AVERAGE TEMP
-Rotates counterclockwise
how do all planets except Venus rotate?
CLOCKWISE
Venus rotates counterclockwise
What is Mars known as?
WHY IS THIS?
THE RED PLANET
-the iron in the soil causes red color
What is Mars?
surface conditions?
moons?
-4th planet from the sun
-2 moons PHOBOS & DEIMOS
-has north and south pole
-has largest volcano
strong winds
polar caps
Who is Percival Lowell?
He left money to find the planet Pluto
He drew false maps of mars that included canals and Martians
What is Ceres?
Largest asteroid/ Dwarf Planet
about the size of Texas
Where is the asteroid belt?
Between Mars and Jupiter
What is Jupiter?
surface conditions?
moons?
-5th planet from the sun
-1300 times bigger than earth
-LARGEST PLANET
-atmosphere=mostly -hydrogen and helium
-has a great red spot (like swirling hurricane)
-Has 4 moons
What are the 4 moons of Jupiter? describe them
- IO- active volcanoes-colorful-
- Europa- covered with ice- Hot core
- Ganymede- largest moon in solar system
- Callisto- most heavily cratered moon in solar system,
who discovered the 4 moons of Jupiter
GALILEO
What is the largest moon in the solar system?
Ganymede
What is Saturn?
how many moons which is the largest
what is it known for?
-6th planet from the sun
-“the ringed planet”
-lots of moons, but the largest is TITIAN
Describe Saturn’s largest moon? name of it? atmosphere?
It is called TITAIN
it has an atmosphere
has hydrocarbon lakes
What is Uranus?
-7th planet from the sun
-NO ROCK
-consists chiefly of hydrogen and helium
What is Neptune?
how many moons? what is the most known moon?
atomosphere?
-8th planet from the sun
-“wizards eye” has a swirling dark spot
-has 14 moons TRITION being the most known
What is triton?
-A moon of Neptune
-Large moon
-has ice volcanoes that erupt.
What is the Kuiper Belt?
what are some of its objects?
The Kuiper Belt is a large region out past Neptune’s orbit
It contains rock and ice chunks -Such as Pluto
What is Pluto?
DWARF PLANET located in the Kuiper Belt
3 MOONS
What is the largest moon of Pluto?
CHARON
What is the largest dwarf planet?
ERIS
How did Pluto get knocked out of being a planet in 2006?
-Eris (largest dwarf planet) was discovered
-It was bigger than Pluto so it was decided that Pluto could not be considered a planet
What is MakeMake?
A dwarf planet almost the size of Pluto
What is Haumea?
A dwarf planet
Face of the moon?
The moon rotates on its axis at the same rate that it orbits the earth
WE ALWAYS SEE THE SAME FACE
what is the Crecent moon shape?
You will see a banana slice
What is the quarter moon shape?
you will see half of the face
What is the Gibbous moon?
nearly full moon—-between quarter and full
What is the maria?
The dark areas of the moon, ancient lava flows that have broken up by meteoroid bombardment, seas
What is the sun?
what does it do?
average ordinary star
-produces it on light
what is the size of the sun?
over 1 million times larger than the earth
what is the distance of the sun from the earth?
93,000,000
what is the temp. at the surface of the sun?
6,000
how many parts of the sun are there?
7
What is the photosphere?
temperature?
surface of the sun
6000K
what is the corona?
temperature?
glowing gas cloud only visible during an eclipse, halo 1 million K
What is solar wind?
it extends out past the planets
How hot is the core of the sun?
15 million kelvin
What is the sun spot cycle length?
11 years
what is the sun spot temperature?
cooler than surroundings
4500K instead of 6000K
where does the sun rotate faster?
at the equator
where does the solar energy reaction come from?
conversion of hydrogen to helium
What is the temperature inside the sun?
14 million Kelvin
what is a light year?
-distance light travels in a year.
what is the speed of light?
186,000
What is Proxima Centauri?
CLOSEST STAR TO EARTH
4 light years away from earth
what is the Red giant?
Large stars with cooler surfaces MASSIVE
What is main sequence?
middle ages star OUR SUN
what is a white dwarf?
about the size of earth — hotter
what is the next phase of the sun?
red giant
Can a heavy star become a supernova?
YES
what is a supernova?
exploded star
what is a neutron star?
remnant after a supernova explosion, small in size
what is a pulsar?
spinning neutron star
What is a BLACK HOLE?
burned out star after a supernova explosion-
gravity so strong
light cannot escape it
What is a galaxy?
island groups of stars (200 billion galaxies
What is Milky Way?
galaxy which our sun belongs to
What is the center in a galaxy
massive black hole
Numbers of arms in the milky way?
4 main arms that spiral out
distance across the milky way?
130,000 light years across, shaped like a fried egg
Number of stars in the milky way?
200 billion
when does a galaxy rotate?
galaxy rotates every 240 million years
what is a nebula
gas and dust cloud
local group
3 dozen in our neighborhood
What is Andromeda?
largest galaxy in our local group