How many stars are there in the Milky Way?

• 100 Billion

• Between 200 and 400 Billion

• Too many to ever really know

• Between 200 and 400 Million

According to the most recent survey of the galaxy's size, how big is the Milky Way?

• 100,000 parsecs in radius

• 100,000 light years in circumference

• 200,000 light years in diameter

• 200,000 parsecs in radius

Tags

NGSS.MS-ESS1-3

According to our most accurate estimation, how old is the Milky Way?

• 13 million years old

• 13 billion years old

• 13 trillion years old

• Its not the years, its the mileage...

How do we know that the Milky Way is a flat disk?

• Because we see more stars near the plane of the galaxy than perpendicular to it

• Because our furthest reaching probes have taken images of the galaxy from just outside it

• Because we see more stars perpendicular to the plane of the galaxy than toward the middle

• We don't because it is a spherical galaxy

Which astronomer first attempted to map the Milky Way galaxy?

• William Herschel

• Johannes Kepler

• William Riker

• William Hershey

Which ancient peoples first coined the term "milky way?"

• The Anasazi

• The Romans

• The Greeks

• The Egyptians

Which galaxy will the Milky Way merge with in about 5 billion years?

• The Pegasus galaxy

• The large Magellanic cloud

• The Sagittarius Dwarf galaxy

• The Andromeda galaxy

What is the name of the object in the center of the Milky Way?

• Sagittarius A

• Sagittarius A*

• Sagittarius A^#

• Sagittarius A^{^}

Approximately how long does it take for our solar system to complete one orbit around the Milky Way?

• 250 Billion years

• 250 Million years

• 250 parsecs

• We don't know, it hasn't completed an orbit yet

Tags

NGSS.HS-ESS1-4

What is the name of the region around outside of the milky way?

• The disc

• The bulge

• The halo

• The expanse