earth & life science solar system (lesson 2)

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The SOLAR SYSTEM (Its Origin & Evolution) Sources: 1. http :// csep10.phys.utk.edu/astr161/lect/solarsys/solar sys.html

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Large Scale Features

Small Scale Features

Relative Sizes & Scale

Masses & Densities

Revolution & Rotation

Angular Momentum

Mars Exploratio

n

Encounter

Hypothesis

Protoplanet Hypothesis

Heliocentric & Geocentric

Model

Current Advancement/Information

Nebular Hypothesis

Rosetta’s Comet

Pluto Flyby

Keep in mind the guide questions: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?

Features of the solar system

Large Scale

Features

Small Scale

Features

Sizes and Scales 

The Relative Radii of the Sun and Planets 

The Sun and the gas giant planets like Jupiter are by far the largest

objects in the Solar System.

Masses and Densities

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

• The large mass of these planets comes from their absolute sizes, not their densities.

• The inner planets are by far the most dense.

Revolution and Rotationof the Planets 

• 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).

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 ….

ANGULAR MOMENTUM 

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

The inner terrestrial planets

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.

The OUTER FOUR PLANETS

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, ammonia, methane).

Large vs. Small Scales

Large vs. Small Scales

Let’s Wrap-up !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?

Let’s Wrap-up !1. Where do you think is the mass of the

Solar System concentrated?* At the center (SUN)

Let’s Wrap-up !2. How will you describe the shape of the orbit of the planets?* Orbits are elliptical.

Let’s Wrap-up !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.

Let’s Wrap-up !4. Do all planets revolve at the same rate? rotate at the same rate?• No. Innermost planets revolve

faster.• Innermost planets rotate

slower.

Let’s Wrap-up !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.