Astronomy: Chapter 7
What features must an object in the pictures have in order to confidently say it is an asteroid? [Select all that apply]
-Moves in a straight line -You can see it in every picture -Looks like a star
The epsilon field includes an asteroid that is headed toward the very center of the field.
true
"More money is spent on making movies about ____________ than on actually finding them."
C) killer asteroids
As the solar nebula cooled, which compounds were the first to condense from a gas to a solid?
C) metals
The moon Titan is special because....
D) its surface is wet
The beta field includes a bright asteroid in the middle right of the field.
false
How many pictures go into each animated movie?
four
The one asteroid in the gamma field is found in
middle left
During the Tunguska Event, people were thrown 20 feet through the air, even though they were ________ away from the explosion.
A) 40 miles
The _________ for discovering exoplanets looks for tiny dips in light as a planet passes in front of its star.
A) Transit Method
Almost the entirety of Jupiter's size is made up of ...
A) gas
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?
Answer: 0.68
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?
Answer: 1928571
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?
Answer: 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.
Answer: 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.
Answer: 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.
Answer: 723.07
The gas in the solar nebula began at a temperature of about ....
B) 2000 K
Why do some astronomers object to the new definition of a planet that was adopted in 2006?
B) By this definition, Earth, Jupiter, and other planets should not be considered planets.
If we could capture the spectrum of an exoplanet, we may find evidence for life on that planet in the form of ....
B) biosignatures
If a star is traveling toward you, its observed spectrum will be ....
B) blue-shifted
The Jovian planets are composed mostly of _______ and _________.
B) hydrogen .... helium
The planets closest to the Sun are known as the ...
B) terrestrial planets
Jupiter weighs roughly ....
B) twice as much as all the other planets combined
Which of the following parts of the formal definition of a planet does Pluto fail to meet?
C) It has cleared the neighborhood around its orbit
