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| what is the name of our galaxy? |
the Milky Way |
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jnc Wed, 21 Apr 2010 22:02:08 GMT |
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| which type of galaxy os the Milky Way |
a barred spiral galaxy |
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jnc Wed, 21 Apr 2010 22:02:08 GMT |
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| list all of the characteristics of an irregular galaxy |
lack a simple shape
consist of mostly blue stars and puffy clouds of gas but little dust |
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jnc Wed, 21 Apr 2010 22:02:08 GMT |
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| list all of the characteristics of a sprial galaxy |
sprial shaped disk with bulge in the center
resembles a pinwheel
bright arms coil out from center |
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jnc Wed, 21 Apr 2010 21:59:38 GMT |
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| list the characteristics of an ellipticle galaxy |
perfect sphere to flat football
brightest in the center-gets dimmer and dimmer coming out
less dust and gas than sprial galaxies
few new stars form in them |
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jnc Wed, 21 Apr 2010 21:59:38 GMT |
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| what are the 3 types of galaxies? |
ellipticle, sprial, and irregular |
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jnc Wed, 21 Apr 2010 21:59:38 GMT |
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| what can people learn from a spectroscope? |
breaks up the light into different colors from the star |
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jnc Wed, 21 Apr 2010 21:59:38 GMT |
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| what is a galaxy |
a system of stars dust and gas held together by gravity |
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jnc Wed, 21 Apr 2010 21:47:38 GMT |
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| red shift |
stars moving quickly away from us |
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jnc Wed, 21 Apr 2010 21:47:38 GMT |
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| blue shift |
stars are moving quickly towards us light waves are compressed as they move towards us |
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jnc Wed, 21 Apr 2010 21:47:38 GMT |
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| What is Hubble's contribution to the galaxies? |
made a way of organizing them: ellipticle, spiral, and irregular
most stars are moving away from each other
our sun was 1 of billions on the milky way |
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jnc Wed, 21 Apr 2010 21:47:38 GMT |
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| describe the big rip |
dark energy causes the universe to expand faster until everything rips apart, even atoms. Matter will be torn apart leaving nothing |
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jnc Wed, 21 Apr 2010 19:57:46 GMT |
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| What is the difference between an open and closed universe? |
closed:the universe will stop expanding and gravity will pull the galaxies back towards each other and the big bang will happen all over again
open:stars will give off their energy and die off and nothing will be left |
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jnc Wed, 21 Apr 2010 19:52:06 GMT |
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| What was Galelio's big invention? |
first telescope |
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jnc Wed, 21 Apr 2010 19:52:06 GMT |
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| why didn't Copernicus publish his theory until right before death? |
church thought that the earth was the center of the universe- afraid of the consequinces he would face from the church |
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jnc Wed, 21 Apr 2010 19:52:06 GMT |
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| what did Copernicus discover? |
sun was in the center of the universe, earth rotated every 24 hours. afraid to publishhis discoveries because of the consequinces from the church |
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jnc Wed, 21 Apr 2010 19:52:06 GMT |
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| which force was responsible for the formation of the stars and the solar system |
gravity |
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jnc Wed, 21 Apr 2010 02:01:20 GMT |
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| which force broke off first? |
gravity |
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jnc Wed, 21 Apr 2010 02:01:20 GMT |
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| list the 4 forces that were in the original atom at the time of the big bang |
gravity, electromagnetism, strong nuclear forces, and weak nuclear forces |
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jnc Wed, 21 Apr 2010 02:01:20 GMT |
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| 3 possible ways the universe can come to an end |
closed universe: galaxies race towards the center of the universe and another big bang will occur
open universe: all the stars will use up their energy and leave nothing left
big rip: dark energy causes the universe to expand faster until everything rips apart, even atoms. matter will be torn apart leaving nothing |
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jnc Wed, 21 Apr 2010 01:58:43 GMT |
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| what became before during and after the big bang? |
before: the universe was smaller than the smallest atom
during: the atom became hot and exploded. There was no air in space, so there was no bang.
After: stars and planets formed, our universe continues to expand |
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jnc Wed, 21 Apr 2010 01:58:43 GMT |
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| when did the big bang occur |
13.7 billion years ago |
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jnc Wed, 21 Apr 2010 01:58:43 GMT |
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| The Big Bang Theory |
a theory of how the universe was created. it was smaller than an atom 13.7 billion years ago. It got really hot , expanded, and formed the universe. has been expanding ever since |
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jnc Wed, 21 Apr 2010 01:58:43 GMT |
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