Astronomy

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

How many asteroids (that we know of) are on a potential collision course with Earth

300-500

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

40 miles

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

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

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

biosignatures

A planet will keep a large atmosphere if it _________ or __________

is cold, has a ton of gravity

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

1,379.469

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

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?

1,156,626.506

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

Eris

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

Gas

The Jovian planets are composed mostly of _______ and _________

Hydrogen, helium

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

Jupiter, Neptune, Saturn, Uranus

The planets closest to the Sun are known as the...

Terrestrial Planets

Why do some astronomers object to the new definition of a planet that was adopted in 2006?

Wrong Answer: It means that we now technically have over 100 planets Try: By this definition, Earth, Jupiter, and other planets should not be considered planets

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

gravity and heat

The moon Titan is special because

its surface is wet