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astro practice test
Terms in this set (50)
What two properties of a planet affect the gravity we feel on its surface?
mass and radius
two planets have the same radius. If planet A is 5 times more massive than planet b, how does gravity differ on the surfaces of the two planets
gravity is 5 times stronger on planet A
Say that there were a planet X in our Solar System with a mass 1/4 the mass of Earth and a radius 1/2 the radius of Earth. How will the gravity on its surface compare to the surface gravity of Earth?
surface gravity on Planet X is the same as on earth
A planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to its orbital plane around its star would ...
have seasons that are not very different from each other as compared to Earth's
The rotation axis of the Earth is ...
tilted at about 23 degrees relative to the axis of the Earth's orbit around the Sun.
In the diagram above, what season and planet is being represented by the red X on the planet on the left in orbit around the Sun?
summer on Uranus
when is the waning gibbous moon highest in the sky
What phase is the Moon in, when observed by the person standing on the Earth in the diagram above?
at what time will the moon set on the day of a solar eclipse
Stars that are in the same constellation:
are likely to be at very different distances from us.
The "North Star" is a star in the constellation of Ursa Minor, which lies just above the North pole of Earth. Which of the following is true?
ursa minor is not a zodiac constellation
A particular Zodiac constellation is high in the sky at midnight in April. Where will it be in October?
near the sun in the daytime sky
What do you expect the spectrum of an object that is 1,000,000 Kelvin to be like?
it should peak at x-ray wavelengths
as compared to a cool star, a hotter star emits
shorter wavelength, higher frequency, bluer color
radio waves can travel large distances without interference because
they have longer wavelengths than visible light
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