Transcript Solar System Powerpoint

Models of the Solar
System
Geocentric Model Earth is considered
to be the center and
everything else
revolves around it.
Heliocentric Model –The sun
is the center of the solar
system.
Copernicus proposed that
the Moon revolves around
Earth, and that the
apparent motion of the
planets, stars, and Sun is
due to Earth’s rotation.
Galileo Galilei found
evidence supporting
Copernicus’ theory and
also saw moons in orbit
around Jupiter.
He concluded that the Sun
is the center of the solar
system.
Copernicus and Galileo
thought that the orbits
of the planets were
circular, but a German
mathematician,
Johannes Kepler,
discovered that they
travel in ellipses, not
circles.
OUR SOLAR SYSTEM
SUMMARY
Early astronomers thought
the Sun, planets, and
stars orbited a stationary
Earth.
 Copernicus suggested
that the Sun was the
center of the solar system.
 Kepler demonstrated that
each planet orbited the
Sun in an elliptical pattern.
OUR SOLAR SYSTEM

My Very Excellent Mother
Just Served Us Nine
(Pizzas)

Solar System—The sun
and all the objects that
orbit around it

Planets reflect light, and
stars emit light.
Inner Terrestrial Planets
Mercury
 Extreme
Temperatures
 Smallest
 Closest to the
sun
Inner Terrestrial Planets
Venus






Second planet from the sun.
Similar in size to Earth
Extremely thick, dense
atmosphere
Hottest average temperatures
Named after the goddess of
love
Sometimes called the morning
star or the evening star
Inner Terrestrial Planets
Earth



Third planet from the
sun.
Water can exist as a
solid, liquid, and a gas.
Only planet not named
after a character in
Roman mythology
Inner Terrestrial Planets
Mars






Fourth planet from the
sun
Commonly called the
Red Planet
Has the “sphinx face”
and “pyramids”
Has polar ice caps
Atmosphere is thinner
than Earth’s.
Two moons, Phobos
and Deimos
Outer “Gas Giants”
The inner and outer
planets are divided by
an asteroid belt.
All of the gaseous outer
planets have rings
and moons.
Outer “Gas Giants”
JUPITER
 Fifth planet from the
Sun
 Largest planet in our
solar system
 Great red spot that is
a massive hurricane
 Has more than 60
moons
Outer “Gas Giants”
SATURN
 Sixth planet from the
Sun.
 Spectacular icy
rings
 Second largest
planet in the solar
system.
Outer “Gas Giants”
URANUS
 Seventh planet from
the Sun.
 Planet rotation is on
its side
 Blue in color due to
methane gas
 Has 27 moons
Outer “Gas Giants”
NEPTUNE
 Eighth planet from the
Sun.
 Blue in color due to
methane gas
 Large blue spot which
is a hurricane-like
storm
Outer “Gas Giants”
PLUTO
 No longer considered
to be a planet due to
highly elliptical orbit
and composition.
 Does not have rings,
and is not
predominately
gaseous only.
Meteoroid, meteor or meteorite?
A meteoroid is interplanetary
material that falls toward
Earth and enters Earth’s
atmosphere. When a falling
meteoroid burns up in
Earth’s atmosphere and
produces a streak of light, it
is called a meteor. If the
meteoroid does not
completely burn up, part of it
will collide with the ground,
and it is called a meteorite.
Comets
Comets are small, icy
bodies that have
highly eccentric orbits
around the Sun.
Some comets are
periodic, such as
Halley’s comet, which
comes every 76 years
(expected again in
2061).