Chapter 7 Astronomy

If the peak wavelength of a star at rest is 660 nm, but astronomers on earth observer that is has been shifted by 0.001 nm. Then how fast (in m/s) is the star moving relative to the earth?

454

If the peak wavelength of a star at rest is 350 nm, but astronomers on earth observer that is has been shifted by 2.25 nm. Then how fast (in m/s) is the star moving relative to the earth?

1928571

A gas particle will escape a planet's atmosphere if it moves faster than the ...

"escape speed"

How many millimeters will a 17 mm wavelength radiowave be shifted if the source is traveling away from the observer at 12,000,000 m/s?

0.68

The discovery of _________ prompted astronomers to reconsider whether Pluto should really be called a planet.

Eris

Which of the following parts of the formal definition of a planet does Pluto fail to meet?

It has cleared the neighborhood around its orbit

If the peak wavelength of a star at rest is 1375 nm, then what peak wavelength is observed when the star is traveling 975,000 m/s away from the Earth.

1379.47

The gas in the solar nebula began at a temperature of about ....

2000 K

Jupiter weighs roughly ....

twice as much as all the other planets combined

During the Tunguska Event, people were thrown 20 feet through the air, even though they were ________ away from the explosion.

40 miles

What two factors influence whether gas particles stay or leave a planet's atmosphere

gravity and heat

The Jovian planets are composed mostly of _______ and _________.

hydrogen .... helium

The moon Titan is special because....

its surface is wet

"More money is spent on making movies about ____________ than on actually finding them."

killer asteroids

If the peak wavelength of a star at rest is 550 nm, then what peak wavelength is observed when the star is traveling 150,000 m/s away from the Earth.

550.275

If the peak wavelength of a star at rest is 615 nm, then what peak wavelength is observed when the star is traveling 2,500,000 m/s toward the Earth.

609.875

If the peak wavelength of a star at rest is 725 nm, then what peak wavelength (in nm) is observed when the star is traveling 800,000 m/s toward the Earth.

723.067

The _________ for discovering exoplanets looks for tiny dips in light as a planet passes in front of its star.

Transit Method

Which of the following planets in our solar system have rings? (Select all that apply)

Uranus Neptune Saturn Jupiter

If a star is traveling toward you, its observed spectrum will be ....

blue-shifted