The document discusses key concepts about the solar system including: - The mass of the solar system is concentrated in the gas giant planets like Jupiter due to their large sizes, not densities. - The planets orbit the sun on elliptical paths and revolve in the same direction counter-clockwise when viewed from above the north pole. - Planets revolve around the sun at different rates, with inner planets revolving faster, and rotate at different rates, with inner planets rotating slower. - Prograde motion is counter-clockwise rotation when viewed from above the north pole, while retrograde motion is clockwise.

2. Large Scale
Features
Small Scale
Features
Relative Sizes &
Scale
Masses &
Densities
Revolution &
Rotation
Angular
Momentum
Mars
Exploration
Encounter
Hypothesis
Protoplanet
Hypothesis
Heliocentric &
Geocentric
Model
Current
Advancement/
Information
Nebular
Hypothesis
Rosetta’s
Comet
Pluto Flyby

3. 1. Where do you think is the mass of the
Solar System concentrated?
2. How will you describe the shape of the
orbit of the planets?
3. Where do planets move around? How
do they move, clockwise or counter
clockwise?
4. Do all planets revolve at the same rate?
rotate at the same rate?
5. What’s the difference between prograde
and retrograde?

4. Large Scale
Features
Small Scale
Features

5. The Relative Radii of the Sun and Planets

6. The Sun and the gas giant planets like
Jupiter are by far the largest objects in the
Solar System.

8. • The masses of the planets are also concentrated in
the Gas Giant planets Jupiter, Saturn, Uranus, and
Neptune.

9. • The large mass of these planets comes from their
absolute sizes, not their densities.
• The inner planets are by far the most dense.

11. • As discovered by Kepler, the planets orbit on
ellipses with the Sun at one focus. In addition, the
planets all revolve in the same direction on their
orbits (direct orbital motion).

12. Prograde & Retrograde
Prograde - counterclockwise when viewed from
above the Earth's North Pole.
Retrograde - clockwise when viewed from above
the Earth's North Pole.
Watch this video-
Retrograde Motion and ….

14. • Objects executing motion around a point possess a
quantity called angular momentum.

15. Inner terrestrial planets are made of materials with high
melting points such as silicates, iron , and nickel. They
rotate slower, have thin or no atmosphere, higher
densities, and lower contents of volatiles - hydrogen,
helium, and noble gases.

16. The outer four planets - Jupiter, Saturn, Uranus and
Neptune are called "gas giants" because of the
dominance of gases and their larger size. They rotate
faster, have thick atmosphere, lower densities, and fluid
interiors rich in hydrogen, helium and ices (water,

19. 1. Where do you think is the mass of the
Solar
System concentrated?
2. How will you describe the shape of the orbit
of
the planets?
3. Where do planets move around? How do
they
move, clockwise or counter clockwise?
4. Do all planets revolve at the same rate?
rotate
at the same rate?

20. 1. Where do you think is the mass of the
Solar
System concentrated?
* At the center (SUN)

21. 2. How will you describe the shape of the orbit
of the planets?
* Orbits are elliptical.

22. 3. Where do planets revolve around? How do
they move, clockwise or counter clockwise?
• Planets revolve around the SUN and are
on the same plane.
• Most planets rotate prograde.

23. 4. Do all planets revolve at the same rate?
rotate at the same rate?
• No. Innermost planets revolve
faster.
• Innermost planets rotate slower.

24. 5. What’s the difference between prograde
and retrograde?
Prograde - counterclockwise when viewed from
above the Earth's North Pole.
Retrograde - clockwise when viewed from above
the Earth's North Pole.