Kepler's Laws, Planetary Motion, and Solar System Facts

What is Newton's 2nd Law?

F = ma, where F is force, m is mass, and a is acceleration

What shape do planets move in according to Kepler's 1st Law?

Ellipses

Where is the Sun located in relation to the orbits of planets?

At one focus of the ellipse

What is perihelion?

The point where a planet is closest to the Sun and moves fastest

What is aphelion?

The point where a planet is farthest from the Sun and moves slowest

What does Kepler's 2nd Law state about planetary motion?

Planets sweep out equal areas in equal times, moving faster when closer to the Sun

What does Newton's 1st Law state?

Objects remain in motion unless acted upon by a force

What does Newton's 3rd Law state?

For every action, there is an equal and opposite reaction

Which planets are classified as Jovian planets?

All gas giants including Jupiter, Saturn, Uranus, and Neptune

What is the Roche limit?

The distance where gravity pulls objects apart, preventing moon formation

What are the main components of Jovian planets?

Mostly hydrogen and helium with a small rocky/metal core

What is a key characteristic of Jovian planets' shape?

They are oblate due to fast rotation

What are the key moons of Jupiter?

Io (volcanic), Europa (possible ocean), Ganymede (largest moon)

What distinguishes Saturn's rings?

They are made of icy particles and are the most visible

Uranus

It rotates on its side, likely due to a collision

Neptune

It has the strongest winds and very active weather patterns

What defines a dwarf planet like Pluto?

It is small, icy, has a thin atmosphere, and is part of the Kuiper Belt

What is the formula for Kepler's 3rd Law?

P² = a³, where P is the orbital period in years and a is the semi-major axis in AU

What does a larger orbit imply about a planet's orbital period?

It results in a much longer period

What is the Law of Universal Gravitation?

F = G(m₁m₂/r²), meaning everything attracts everything

What factors affect the strength of gravitational attraction?

Bigger mass increases gravity, while larger distance decreases it

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