01.2 Measuring the Universe

Front

Convert to scientific notation: 520,000,000

Back

5.2E8

Front

An object at the other end of the universe is billions of ___________ away.

Back

Light years

Front

An arcsecond of parallax is known as a ________.

Back

1 parsec

Front

A light-year (ly) is the distance that light travels in one year. If a star is 3 ly from Earth, how long does it take light from that star to reach Earth?

Back

3 years

Front

ANY number raised to a power of 0 will be....

Back

1

Front

What is the definition of a light-year?

Back

The distance that light travels in one year.

Front

What is the relationship between parsecs and light-years?

Back

1 parsec is approximately 3.26 light-years.

Front

How do you convert a number to scientific notation?

Back

Move the decimal point to create a number between 1 and 10, then multiply by 10 raised to the number of places moved.

Front

What is the approximate distance of 1 AU in kilometers?

Back

About 149.6 million kilometers.

Front

What is the speed of light in a vacuum?

Back

Approximately 299,792 kilometers per second.