16 terms

Earth in the Universe


Terms in this set (...)

heliocentric theory
the theory that states the sun, not the Earth was the center of the solar sytem proposed by Copernicus
geocentric model
the theory that states the Earth is the center of the solar system proposed by Ptolemy
term refers to the sun
term refers to the Earth
scientist who proposed the heliocentric model of the solar system
scientist who proposed the geocentric model of the solar system
large groups of stars, dust and gas
______________ galaxies have a bulge at the center and spiral arms made up of gas dust, and stars (The Milky Way is an example of this type of galaxy)
Milky Way
The ________________ ________ galaxy in which we live is shaped like a flat pinwheel, this type of galaxy is a barred spiral galaxy. Our solar system is located in the Orion arm of this barred spiral galaxy.
the study of the origin, properties, processes, and evolution of the universe
big bang theory
the theory that states the universe began with a tremendous explosion 13.7 billion years ago
All space-time, matter, and energy, including the solar system, all stars and galaxies, and the contents of intergalactic space, regarded as a whole
steady state theory
a theory which states that there was no beginning to the universe and that the universe does not change in appearance.
the universe has always existed and always will, in the state it is in now
Virgo Supercluster
t contains the Local Group with our galaxy, the Milky Way. It also contains the Virgo Cluster near its center, and is sometimes called the Local Supercluster. It is thought to contain over 47,000 galaxies.
Local Galaxy Group
is the galaxy group that includes the Milky Way. The Comprises more than 54 galaxies, most of them dwarf galaxies. ... Its gravitational center is located somewhere between the Milky Way and the Andromeda Galaxy.
solar system
the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.

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