Units and Measurements

Question 1

Astronomical Unit (AU)

Answer 1

The Earth’s distance from the Sun (About 150 million kilometers)

Question 2

Light Year (ly)

Answer 2

The distance that light can travel in 1 year (about 10 trillion kilometers)

Question 3

Approximate number of galaxies; approximate number of stars per galaxy

Answer 3

100 Billion

Question 4

Estimated age of the universe

Answer 4

14 billion years

Question 5

Our solar system formed approximately this long ago

Answer 5

4 ½ billion years

Question 6

The point directly over earth’s North Pole

Answer 6

North Celestial Pole

Question 7

The point directly over Earth’s south pole

Answer 7

The South Celestial Pole

Question 8

the path the Sun follows as it appears to circle around the celestial sphere once each year

Answer 8

ecliptic

Question 9

the size that objects in the sky appear to be

Answer 9

angular size

Question 10

measurement of north-south position on earth

Answer 10

latitude

Question 11

measurement of east-west position on Earth

Answer 11

longitude