Space Science - created from Mind Map

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Structure of the Universe

Gravity and the Solar System

What makes up the universe?

How are distances in the universe measured?

What is the structure of the universe?

Earth

The Solar System

Stars

Galaxies

Light-year

9.5 trillion km per year

300,000 km per second

The distance light travels in a year

Clusters and Superclusters

Voids/ Soap Bubbles

What is Gravity?

What are Kepler's laws?

What is the law of universal gravitation?

How did the solar system form?

A force of attraction between objects that is due to their masses and the distances between them.

Kepler's First Law

Kepler's Second Law

Kepler's Third Law

Each planet orbits the sun in an ellipse with the sun at one focus.

As a planet moves around it's orbit, it sweeps out equal areas at equal times.

The square of the orbital period is proportional to the cube of the planet's average distance from the sun.

p^2=a^3

All objects in the universe attract each other through gravitational force.

How does gravity affect planetary motion?

Centripital force

The inward force that causes an object to move in a circular path

Solar Nebula

A cloud of dust and gas in space

A protostellar disk formed from the collapsed solar nebula

Collapses due to unknown cause

The sun formed at the center of the protostellar disk

Planetesimals formed in the protoplanetary disk

Large bodies of dust from which planets formed

Planets form from planetesimals