Transcript What is a solar system?

• Here are some slides to help you study.
• Note: Not ALL of the topics are included in
these slides
What is a solar system?
• A region of space where the gravitational
force of a star influences all other objects.
• In our solar system, the gravitational pull of
the sun keeps the planets in orbit
Our solar system
• Our star, the sun, is the largest object in the
solar system. Therefore, the sun is the object
with the most gravitational force.
• Our solar system started about 5billion years
ago.
• Our star has about 5 billion years left before it
dies out.
Formation of our Solar System
Formation of Solar System Video
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Our Star: THE SUN
A giant sphere made of plasma.
Heat and light comes from nuclear fusion
Medium-size star
Formed 5billion years ago
93,000,000mi or 150,000,000km from Earth
Will run out of Hydrogen, nuclear fusion will stop
and the star will die in about 5billion years
• The largest object in our solar system
• The gravity holds all of the objects that make up
our solar system in place.
The formation of our solar system.
About 5 billion years ago…
1. There was a swirling cloud of dust and gas, known as a
nebula.
2. Gravity pulls all the gas together until a huge mass is
formed in the center of the nebula. Nuclear fusion
occurs and the sun, a star, is formed.
3. The rest of the gas and dust from the nebula are
brought together by gravity, forming the planets and
other objects in our solar system.
4. The planets continue to revolve (spin) around the star,
trapped within it’s gravitational pull.
Some solar system vocabulary
Main Idea
Details and examples
Orbit
The path an object takes
Revolution The
Rotation
Axis
Spinning on an axis
KEY FROM SOLAR WALK WORKSHEET
Main Idea
Solar
Distance
Year Length
Day Length
Gravity
Details
Distance the planet is from
the sun
The time it takes for the
planet revolves around the
sun once
The time it takes for the
planet to rotate on its axis.
The attractive force between
2 objects
Main Idea
moon
Mass
Density
Details
An object that revolves
around a planet. A natural
satellite
The amount of matter in an
object
The amount of mass in a
given space.
More
dense
Less
dense
How compact the stuff is …
A planet is….
• an object that is a sphere
• Revolves around a star
• Large enough to have enough gravity to clear
all objects out of it’s orbit
• Orbit is on the same plane
INNER PLANET
(Terrestrial planet)
Outer Planet
(Gas Giants)
Closer to the sun
Farther from the sun
Smaller
Larger
Rocky
Gaseous
Less mass
More mass
More Dense – More
stuff packed in a
space
Less Dense-Less stuff
packed into a space
Close to each other
Far from each other
Hotter
Colder
Longer day
Rotate slower
Shorter day
Rotate faster
Shorter year
Revolve faster
Longer year
Revolve longer
Less gravity
More gravity
No Rings
Rings
Less moons
More moons
Comet: - Chunks of ice, dust & rock
-Have a tail when close to sun
-Elliptical orbit that goes into the
kuiper belt
Asteroid: - Made of rock (metals)
-Found in the asteroid belt
Meteoroid: -A chunk of rock/dust in space
formed from comets or asteroids
Meteor: Meteoroid that is going through
the atmosphere. This is what a
shooting star is.
Meteorite: -Meteor hits the ground
-a rock
Comet: Chunk of ice and dust