Vocab 1
A spherical object that orbits the sun and has removed other objects from its orbit
Planet
Made of different ices covered by a layer of gravel and dust
Comet
The two Greek philosophers that always disagreed with each other over how the solar system works
Plato and Aristotle
The first planet, covered with craters and one year is only 1.5 days
The Fourth planet, that is reddish in color with a thin atmosphere of carbon dioxide
Mars
A spherical object that orbits the sun but is not large enough to move other objects from its orbit
Dwarf Planet
A rocky object that orbits the sun
Asteroid
Was the assistant of Tycho Brahe, a Christian mathematician, and created the three laws of planetary motion
Johannes Kepler
The second planet that has an opaque atmosphere and is extremely hot at its surface
Venus
The Fifth planet, that is the largest and most massive in our solar system. Has a giant hurricane called the "Red Spot"
Jupiter
A small, rocky object in space
Meteoroid
A natural satellite of a planet
Moon
Wrote the book "On The Revolutions of the Celestial Spheres" about how Earth and the planets orbited the sun
Nicolaus Copernicus
The First law of planetary motion states that planets move this way
Ellipse
The Sixth planet, made of hydrogen and helium, with rings made of ice and rocky debris
Saturn
A meteoroid that enters the Earth's atmosphere
Meteor
The theory that the sun is the center of the solar system
Heliocentric
Studied Jupiter's moons and the phases of Venus
Galileo Galilei
The second law of planetary motion states that a planet moves _____ when closer to the sun and _____ when farther away
Faster; slower
The Seventh planet, that is made of water, methane, and ammonia. Has two sets of nearly invisible rings
Uranus
A meteoroid that reaches the Earth's surface
Meteorite
The theory that the Earth is the center of the solar system
Geocentric
A Drastic change in thinking about the solar system
Copernican Revolution
The third law of planetary motion states that a planets distance from the sun and the time it takes to orbit is always _______
Mathematical
The Eighth planet, that has clouds made of ice and has the fastest winds in the solar system
Neptune