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27 Terms
What is astronomy?
The study of the moon, stars, and other objects in space
Turn 47,000 into scientific notation
4.7 x 10^4
what is astronomy
study of the universe
what is geocentrism
belief that the earth is the center of the universe
What is heliocentrism?
belief that the sun is the center of the universe
what did space based telescopes let us see?
other galaxies
what is the celestial sphere?
An imaginary sphere surrounding Earth, onto which all celestial bodies are projected.
Which of the following is NOT found along the ecliptic?
the equator
What does a light year (ly) measure?
The distance light travels in one year.
what is a Stellar parallax?
the apparent shift of position of any nearby star (or other object) against the background of distant objects.
how many times each day do tides occur?
2 times
The alternate rising and falling of the sea due to the attraction of the moon and sun is called?
a tide
Earth has an obliquity (tilt) of approximately 23.5 degrees. Jupiter's obliquity is 3 degrees, which means it rotates nearly straight up and down. Which of the following is true about how this would affect Jupiter's seasons?
it wouldn't have a season
One reason that Earth has different seasons is because of Earth's ?
tilted axis
How much of the moon is always reflecting light from the sun?
half at all times
A solar eclipse can only occur during a?
new moon
Which of the following is the most widely accepted theory for how we gained our moon?
A Mars-sized planet collided with Earth, sending debris out into space, which eventually formed our moon.
In the equation Fg = m x g,
g is the?
gravitational acceleration of the planet you are on
Use the equation Fg = m x g
Neptune has a gravitational acceleration of 11.1 m/s2 and Uranus has a g of 8.9 m/s2.
Which planet would you weigh more on?
neptune
Transfer 1.6x102 to standard notation:
Transfer 3.14x16 to standard notation
3,140,000
what does obliquity mean?
the tilt of the earth
what does Precession mean?
the change in direction the axis is pointing.
What does eccentricity mean?
how oval shaped a planet's orbit is.