Crash Course #25 Quiz

What method did ancient Greeks use to determine the distance to the Sun?

• Bouncing radar pulses off Venus

• Timing lunar eclipses

• Parallax

• Transit of Mercury and Venus

What is the distance from the Earth to the Sun known as?

• A kilometer

• A parsec

• A light year

• An astronomical unit

What is the distance to the nearest star, Proxima Centauri, in light years?

• 2.5 light years

• 6.8 light years

• 4.2 light years

• 8.5 light years

What unit of distance is based on the angle a star shifts over the course of a year?

• A kilometer

• A parsec

• An astronomical unit

• A light year

What method is used to determine the distance to stars that get brighter and dimmer over time?

• Timing lunar eclipses

• Transit of Mercury and Venus

• Pulsating stars

• Parallax

What is the distance light travels in a year known as?

• A parsec

• A light year

• An astronomical unit

• A kilometer

What is the method used to determine the distance to stars in other galaxies?

• Transit of Mercury and Venus

• Brightness comparison

• Timing lunar eclipses

• Parallax

What is the distance from the Earth to the Sun in kilometers?

• 151,200 km

• 50,000,000 km

• 149,597,870.7 km

• 248,510,000 km

What is the method used to determine the distance to stars using the Earth's orbit as a baseline?

• Brightness comparison

• Transit of Mercury and Venus

• Pulsating stars

• Parallax