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Shape and Structure
Size
Parts
Vocabulary
Milky Way Facts
100
THE TYPE OF GALAXY THE MILKY WAY IS
What is SPIRAL GALAXY
100
THE DIAMETER OF THE GALAXY
What is 100,000 LIGHT YEARS
100
THE PITCH ANGLE OF THE SPIRAL ARMS
What is 75 DEGREES
100

THE NAME OF THE BLACK HOLE AT THE CENTER OF OUR GALAXY

What is SAGITTARIUS A

100
THE LENGTH OF TIME IT WOULD TAKE THE SOLAR SYSTEM TO TRAVEL ALL THE WAY AROUND THE MILKY WAY
What is 230 MILLION YEARS
200
WHERE THE POPULATION II STARS ARE IN THE GALAXY
What is GALACTIC CORE/BULGE
200
THE THICKNESS OF THE DISK
What is 1,000 LIGHT YEARS
200
THE NAME OF THE SPIRAL ARM THAT OUR GALAXY IS IN
What is ORION
200
A FLAT DISK OF STARS, GAS, AND DUST WITH PRONOUNCED SPIRAL ARMS THAT ROTATES DIFFERENTIALLY AROUND THE CENTER OF THE GALAXY
What is GALACTIC DISK
200
THE AGE OF MOST STARS IN THE GALAXY
What is 4.5 BILLION YRS
300
WHERE THE YOUNG STARS RESIDE
What is THE ARMS
300
THE ASTRONOMER WHO MADE THE FIRST RELIABLE MEASUREMENT OF THE GALAXY
WHO IS HARLOW SHAPELY
300

THE NAME OF ONE OF THE NEIGHBORING ARMS TO THE MILKY WAY NAMED AFTER A MYTHOLOGICAL HERO WHO ALSO HAS A CONSTELLATION IN HIS NAME

What is PERSEUS

300
A FLAT ROTATING DISK OF GAS AND DUST SURROUNDING AN OBJECT, SUCH AS A BLACK HOLE
What is ACCRETION DISK
300
THE MOST COMMON TYPE OF STARS IN THE GALAXY
What is RED DWARF
400
THE BRIGHT FLAT ARRANGEMENT OF STARS AND GAS CLOUDS THAT SPREAD OUT OVER ITS ENTIRETY AND MARKED BY SPIRAL ARMS
WHAT IS THE DISK
400
THE NUMBER OF STARS IN THE MILKY WAY
What is ABOUT 200 BILLION
400
THE NAME OF THE OTHER NEIGHBORING ARM
What is SAGITTARIUS
400
A COLLECTION OF STARS, GASSES, AND DUST BOUND TOGETHER BY GRAVITY
What is GALAXY
400
THE REASON WE KNOW THAT A BLACK HOLE IS AT THE CENTER OF THE GALAXY
What is THE GRAVITATIONAL EFFECTS
500
THE NUMBER OF SPIRAL ARMS IN OUR GALAXY
What is 5
500
THE MASS OF THE MILKY WAY GALAXY
What is UNCERTAIN
500
THE RING OF HOT GAS, OLD STARS, AND GLOBULAR CLUSTERS THAT SURROUNDS THE GALAXY
What is ASPHERICAL HALO
500
THE NAME OF OUR GALAXY, WHICH INCLUDES THE WHITISH BAND OF STARS VISIBLE IN THE NIGHT SKY
What is THE MILKY WAY
500
THE GALAXY ON A COLLISION COURSE WITH OUR GALAXY
What is ANDROMEDA