PLANETS
MOON MOMS
STARS AND GALAXIES
NUMBERS
HISTORY
100
THE THIRD PLANET FROM THE SUN
EARTH!
100
TITAN
SATURN
100
THE CLOSEST STAR TO EARTH
THE SUN!
100
186,000 MILES PER SECOND
THE SPEED OF LIGHT
100
HE FOUND THE THREE LAWS OF PLANETARY MOTION
JOHANNES KEPLER
200
THE LARGEST PLANET
JUPITER
200
PHOBOS AND DEIMOS
MARS
200
OUR HOME GALAXY
THE MILKY WAY
200
93,000,000 MILLION MILES
AN ASTRONOMICAL UNIT (AU)
200
HE WAS PERSECUTED AFTER VIEWING THE FOUR (MAJOR) MOONS OF JUPITER
GALILEO
300
THE MORNING (EVENING) STAR
VENUS
300
CALLISTO
JUPITER
300
AT 4.2 LIGHT YEARS, THE CLOSEST STAR TO THE SOLAR SYSTEM
PROXIMA CENTAURI
300
5.9 TRILLION MILES
A LIGHT YEAR
300
THIS MAN "DISCOVERED" THE GALAXIES IN 1925
EDWIN HUBBLE
400
IT CAN FLOAT ON WATER
SATURN
400
TRITON
NEPTUNE
400
THE NORTH STAR
POLARIS
400
3.26 LIGHT YEARS
A PARSEC
400
THE THEORETICAL PHYSICIST WHO MADE A GUEST APPEARANCE ON "THE BIG BANG THEORY"
STEPHEN HAWKING
500
THE SEVENTH PLANET
URANUS
500
MIRANDA
URANUS
500
THIS PHENOMENON CREATED THE CRAB NEBULA
A SUPERNOVA
500
243 DAYS
A YEARON VENUS
500
IN 1930, THIS ASTRONOMER "DISCOVERED" THE DWARF PLANET PLUTO
CLYDE TOMBAUGH
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