Astronomy - Chapter 8

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

Jupiter weighs roughly

twice as much as all the other planets combined

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

"escape speed"

Almost the entirety of Jupiter's size is made up of ..

gas

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

"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 830 nm, but astronomers on earth observer that is has been shifted by 3.2 nm. Then how fast is the star moving relative to the earth?

1,156,626.51

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 is the star moving relative to the earth?

1,928,571.429

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 is the star moving relative to the earth?

454.56

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 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, Saturn, Jupiter, Neptune

If we could capture the spectrum of an exoplanet, we may find evidence for life on that planet in the form of

biosignatures

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

blue-shifted