astro quiz

A solar system contains ?

• a primarily planets

• large amounts of gas and dust but very few starts

• large amounts of gas, dust, and stars

• a single star and planets

• thousands of super clusters

A galaxy contains ?

• primarily planets

• large amounts of gas and dust but very few stars

• large amounts of gas, dust, and stars

• a single star and planets

• thousand of super clusters

how many centimeters are there in one kilometer ?

• 100

• 1000

• 10,000

• 100,000

• 1*10^6

scientific notation is used in science because

• it make it easy to write large or small numbers

• all astronomical distances are expressed in metric units

• it makes conversations between units easy

• all of the above

• none of the above

the avg distance from earth to the sun is

• 1 ly

• 1 million km

• 1 million miles

• 1 billion km

• 1 AU

If light takes 8 minutes to reach earth from the sun and 7.3 hours to reach pluto, what is the approximate distance from the sun to pluto?

• 55 AU

• 7.3 AU

• 7.3 ly

• 0.6 ly

the sun is

• a star

• 1 AU from earth

• more than 100 times the diameter of earth

• all of the above

If the nearest star is 4.2 light-years away then

• the star is 4.2 million AU away

• the light we see left the star 4.2 years ago

• the star must have formed 4.2 billion years ago

• the star must be very young

• the star must be very old

the milky way galaxy

• contains about 100 stars

• is the largest known object to the universe

• is about 75,000 light years in diameter

• is located about 2.2 million light years from the sun

Which of the following is the largest ?

• the diameter of earth

• the diameter of the moon

• the diameter of the sun

• the diameter of Jupiter

• the distance from earth to the sun