Cosmic Distances and Time

One ​ (a)   is the distance between the Earth and the ​ (b)   .

• astronomical unit
• Sun
• Kaipur Belt
• nearest galaxy
• light year
• mile
• moon
• kilometer

​ (a)   are used to measure distances to objects outside of our ​ (b)   .

• Light years
• galaxy
• Parsecs
• state
• country
• helios
• Meters

A ​ (a)   is the distance that light can travel in ​ (b)   .

• light year
• one year
• parsec
• meteor
• 3 years
• astronomical unit
• blindit

The night sky is filled with stars in our galaxy, which is called ​ (a)   .

• the Milky Way
• Proxima Centauri
• Vega
• Andromeda
• Bode's Galaxy

We are all traveling in time at approximately the same speed: ​ (a)   .

• one second per second
• 300,000 kilometers per second
• 1.08 billion kilometers per hour
• 186,000 miles per second
• 10 meters per second

When we look into the sky with a ​ (a)   , we are seeing what those stars and galaxies looked like ​ (b)   .

• telescope
• a very long time ago
• periscope
• when the big bang happened
• rubber duck
• in the future
• stethoscope
• if it never happened

Albert Einstein's theory of relativity says that ​ (a)   are linked together.

• time and space
• peanut butter and jelly
• the sun and the moon
• galaxies and parsecs
• light and speed