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Cosmos: When Knowledge Conquered Fear (Season 1 Episode 3)
Terms in this set (29)
Long period comets originate from the
The existence of a vast spherical cloud of small icy bodies past the Kuiper Belt where comets come from was first postulated by
Comets are largely made of
As comets approach the Sun, ice and other gasses evaporate forming the comet's
The earliest known accurate star map of the Southern Hemisphere was created by
The most massive object in this solar system is the
The most massive planet in the solar system is
Using an early microscope, __________ discovered and named the cell.
Johannes Kepler demonstrated that, instead of orbiting in perfect circles, planetary orbits are
A (An) __________ is a closed curve with two foci. A circle is a special case in which both foci are in the same location.
The __________ is the smallest unit of life (excepting viruses, if you consider them alive) -- sometimes called the building block of life.
The closer a planet is to the Sun, the __________ the planet moves.
Who invented the reflecting telescope?
Newton's law of universal gravitation shows the force of gravity between two objects is proportional to the objects'
Newton's law of universal gravitation shows the force of gravity between two objects is inversely proportional to the square of the objects'
Newton's 1st law of motion describes
__________ - an object at rest will remain at rest and an object in motion will remain in motion at constant velocity unless acted upon by an outside (or unbalanced) force.
Newton's second law of motion describes how force changes the motion of an object through what formula?
Newton's 2nd law of motion
The formula F=ma comes from
Newton's 3rd law of motion
The idea that "for every action, there is an equal and opposite reaction" comes from
Who, along with Leibniz, is credited with developing the branch of mathematics known as calculus?
What branch of mathematics did Newton develop as part of his work on motion and gravity?
__________ created the first meteorological map showing the predominant wind patterns over the oceans.
__________ created the first map of the Earth's magnetic field.
A __________ is when one object in space crosses in front of another object in space.
Edmund Halley proposed using the transit of _________ across the disc of the Sun as a way to calculate the distance to the Sun.
1 AU (astronomical unit) is the average distance from the Earth to the
One AU is about 93 million miles. AU stands for
Halley did not discover Halley's comet, he figured out the comet's __________
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