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6th Grade

Astronomy I

Geocentrism disproved theory that the Sun and other planets revolved around the Sun; proposed by Ptolemy
Heliocentrism theory that the Earth and other planets revolve around the Sun; proposed by Copernicus
Elliptical Planets orbit in this shape; Kepler describes this shape in his laws of planetary motion
Galileo first astronomer to use telescopes to explore space; discovered moons, sunspots, etc.
Newton discovered gravity; helped astronomers understand the reason planets orbit and move
Lunar eclipse When the moon passes through the Earth's shadow; creates a red moon (only can occur during a FULL moon)
Solar eclipse When the Earth passes through the moon's shadow; only occurs during a NEW moon
Waning moon phase losing sunlight; moon will be lit on the LEFT
Waxing moon phase gaining sunlight; moon will be lit on the RIGHT
Moon phase sunlight portion of the Moon which changes as the moon revolves and rotates
Reflecting telescope telescope which uses mirrors to reflect light and form an image
Refracting telescope telescope which uses lenses to form images
Artificial satellites any man-made object orbiting the Earth and other planets (aid in GPS, radios, television, etc)
Gravity physical force and attraction between two objects in space; depends on the MASS of the objects and the DISTANCE between the objects
Inertia objects in motion, stay in motion. objects at rest, stay at rest.
What two forces create an orbit? Inertia and gravity
Space probes uncrewed vehicle that carries scientific instruments into space to collect scientific data
Big Bang theory the theory that states the universe began with a giant explosion 13.7 billion years ago
How is the universe organized? Into galaxies, which are clusters of millions of stars. Each galaxy has planetary systems, like solar systems. Each of those have planets. "Everything is a part of something bigger."
Cosmic background radiation radiation coming from all directions in space; believed to be leftover radiation from the Big Bang theory
What are the moon phases IN ORDER, starting with the full moon? Full moon, waning gibbous, third quarter, waning crescent, new moon, waxing crescent, first quarter, waxing gibbous
What causes the seasons? The tilt of the Earth
Hubble space telescope produces very clear images of objects in deep space
Rotation body turning on its axis
Revolution the motion of a body that travels around another body in space; one complete orbit around a body
Orbit the path that a body follows as it travels around another body in space
Day time required for Earth to rotate once on its axis
Year time required for Earth to revolve around the Earth
Month a division of the year based on the orbit of the moon around the Earth
Created by: Mrs. Corey