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35 Cards in this Set

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This planet is closest to the sun. Has no protective atmosphere.
Mercury
The four rocky planets
Mercury
Earth
Venus
Mars
This planet shows massive craters, has no atmosphere
Mercury
The second planet from the sun, has sulfuric acid atmosphere
Venus
The two spacecraft that have landed on this planet were crushed by the atmospheric pressure and melted by the heat.
Venus
This planet has an atmosphere of nitrogen and oxygen
Earth
What planet has a desolate desert, a mountain 75,000 ft high, and canyon extending several thousand miles?
Mars
This is the fourth planet from the sun.
mars
The fifth planet from the sun is 12x the size of earth
Jupiter
How many moons does Jupiter have?
61
Which planet has the Red Spot?
Jupiter
What is the sixth planet from the Sun?
Saturn
What makes Saturn oblate?
1) Fast rotation
2) low density
This planet, seventh from the sun, is tilted on its side
Uranus
The eighth planet from the sun, but is sometimes the farthest from the sun.
Neptune
Surface of this planet is very cold, but core is hot, causing surface winds of 1000 mph
Neptune
What planet should have been called an asteroid?
Pluto
The point at which a planet is farthest from the Sun
aphelion
Point at which planet is closest to Sun
perhelion
When a planet is in line with Earth in relation to Sun
opposition
What is a conjunction?
When two or more bodies appear in the sky within 1 degree of each other in the Zodiac
What is an astronomical unit?
average distance between the earth and sun: au
What is the speed of light?
186,170 miles/second
What is a light year?
The distance light can travel in a year
What is the difference between a meteor and a meteorite?
A meteor is small..burns up
A meteorite makes it to earth
What is red shift used for?
To determine how far away something is
What is a galaxy?
Systems of stars and interstellar matter
What are the four types of galaxies?
Spiral
Lenticular
Elliptical
Irregular
What indicated that the Big Bang was not uniform?
Microwave background
What causes light to show different colors?
Different elements
What causes the birth of a star?
enormous clouds of dust and gas collapse under the force of gravity
What happens at the core of a star?
Nuclear fusion
What happens when a star has used up all of its core hydrogen fuel?
It begins to fuse helium and other elements, and grows in size becoming a Red Giant
What happens to a star when it runs out of fuel?
It collapses into a white dwarf star
What is cosmology?
Study of the origin and future of our universe