Comets
Planets
Gravity
Galaxy
Universe
100
Gottfried kirch
Who was the first to discover comets
100
Uranus
What was the first planet discovered
100
Sir isaac newton
Who discovered gravity
100
Stars, gas, and dust
What is in our galaxy
100
13.7 billion years ago
When was our galaxy formed
200
November, 14, 1680
When were comets discovered
200
William hershel
Who discovered the first planet
200
Sir isaac newton was sitting under a tree and an apple fell on his head.
How was gravity discovered
200
Milky way
What type of galaxy do we live in
200
Smaller than an electron
Originally how small was our universe
300
17th century
What century was the first comet discovered
300
March, 13, 1781
When was the first planet discovered
300
1642-1727
When was gravity discovered
300
Older than our 4.5 billion year old sun
How old are the stars in our milkyway
300
A tiny fraction of a second
How fast did our universe form
400
Ice, dust, carbon dioxide, ammonia, and methane
What is a comet made of
400
8 planets
How many planets do we have in our solar system
400
Objects with mass
What does gravity affect
400
Spiral galaxy
What kind of galaxy do we have
400
Rapidly expanding balloon
Metaphorically speaking how did our universe expand
500
Gas or dust
What does a comet release
500
Mercury, veus, earth, mars, jupiter, saturn, uranus, neptune
What are the planets in order
500
To the center of the earth
Where does gravity pull things
500
13.6 billion years old
How old is our galaxy
500
Cosmos
What is another term for the universe
M
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