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Astronomy & Cosmology  

created by Simmy8 on 5 Oct 12
Medium level (64% of success)    30 questions - 1 023 players
Based on Khan Academy Science and Cosmology Videos
A summary is posted at the website link and at myonlinehomeschool. blogspot.com
 
1
The _________ is 109 x the circumference of the Earth
   
   
   
   
2
150 million Km is __________ or the distance of the earth from the sun
   
   
   
   
3
It takes __________ for light to travel from the Sun to the Earth
   
   
   
   
4
________ is considered a dwarf planet and is located within the Kuiper belt
   
   
   
   
5
The largest planet is__________
   
   
   
   
6
The _____________ is speculated to be about 1 light year from the sun
   
   
   
   
7
The _______________ is super high velocity particles of electrons and protons projected from the Sun traveling at 400 km/sec
   
   
   
   
8
The ____________ is where the velocity of the forces of the sun particles slow because of hydrogen and helium
   
   
   
   
9
The four space telescopes in the NASA Great Observatories program are :
   
   
   
   
10
Voyager 1, now located as of 2012 in the heliosheath may become the first manmade object to ever______________
   
   
   
   
11
Scientists think that a super dense _____________ is at the center of our galaxy
   
   
   
   
12
There are about ____________ stars in the Milky Way Galaxy
   
   
   
   
13
The nearest large galaxy, the ____________ galaxy has trillions of stars
   
   
   
   
14
It is about _____________ to the edge of the known or visible universe
   
   
   
   
15
The objects at the edge of the known universe are now about 40 or 45 billion light years away due to _____________
   
   
   
   
16
The prevailing theory of how the universe began is the_______________
   
   
   
   
17
The Big Bang theory is that the Universe began as an infinitely small ____________ and expanded from there
   
   
   
   
18
Alan Guth proposed that there was a major period of ____________ to account for the issue of "homogeneity" in the Big Bang Theory
   
   
   
   
19
We know that the universe
   
   
   
   
20
At ______________ there is enough pressure and temperature for fusion to occur in a star.
   
   
   
   
21
Our Sun is a ________________ star, super high pressure and temperature keeps it from collapsing as the gravitational force is offset
   
   
   
   
22
A ___________ is an interstellar gas or cloud of Hydrogen gas which is a breeding ground for the birth of stars
   
   
   
   
23
The apparent change in position because of the change in line of sight is called__________
   
   
   
   
24
A ____________ is the distance of something that has a parallax angle of 1 arc second
   
   
   
   
25
If a star is more than 20 x the size of our sun, it will eventually turn into a ________
   
   
   
   
26
63, 115 au = _________
   
   
   
   
27
We know whether a star's brightness is because it is closer or because it is brighter because of the work of Henrietta Swan Leavitt and her work with ____________
   
   
   
   
28
There are two types of black holes__________ and _____________
   
   
   
   
29
Scientists say that the Milky Way has a black hole at the center because of
   
   
   
   
30
______________ is the change in frequency of a wave or other periodic event fo ran observer moving relative to its source.
   
   
   
   
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