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Geocentric Model

Ptolemy

Heliocentric Model

Copernicus

Inner Planets

Mercury, Venus, Earth, Mars

Outer Planets

Jupiter, Saturn, Uranus, Neptune

Big Bang Theory

a theory that explains how the universe was formed

terrestrial

earth like; rocky

satellite

a natural or man-made object that orbits another

How Stars are Classified

size, color, tempature, brightness

apparent magnitude

how far a star appears to be

absoulute magnitude

how far a star actually is

light year

unit of measurement for distances in space

Stages of the Life Cycle of a Star

high mass and low mass

3 types of galaxies

spiral, elliptical, irregular

Expanding Universe Theory

galaxies are moving farther away from each other

Compare and Contrast the Inner and Outer Planets

All of the planets: are apart of one galaxy, revolve around the Sun, don't produce light, and spin on it's axis
Planets differ because: inner planets are earth like and rocky while outer planets are gas giants and have rings

Compare and contrast a geocentric model of the solar system and a heliocentric model of the soar system.

Geocentric model: revolves around the Earth
Heliocentric model: revolves around the Sun
Both Heliocentric and Geocentric models have the same objects revolving around each other.

Nebula

huge clouds of gases and dust

protostar

pockets of matter that form the beginning of stars

developed stars

stops shrinking and begins to shine

red giant

outer layers expand and move farther from the core

supernova

exploding star

blackhole

very strong gravitational hold

neutron star

the star's remaining matter is crushed

white dwarf

last traces of fuel run out

black dwarf

dead star

Mercury

-terrestrial
-closest to the Sun
-has no atmosphere

Venus

-terrestrial
-named for Roman Goddess of beauty
-atmosphere is made up of carbon dioxide and sulfuric acid

Earth

-terrestrial
-only planet with animal and plant life

Mars

-terrestrial
-most resembles Earth

Jupiter

-gaseous
-largest planet
-large red spot called "The Storm"

Saturn

-gaseous
-spectacular rings (known for them)

Uranus

-gaseous
-axis is tilted way over on its side

Neptune

-gaseous
-swirling blue aand white features

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