Gaia (or other spellings) is generally accepted as a mythical Greek name for Earth. No one really know, for sure, where the name “Earth” came from.

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Presentation transcript:

Gaia (or other spellings) is generally accepted as a mythical Greek name for Earth. No one really know, for sure, where the name “Earth” came from

Earth is a two-planetary system with its moon Luna. 1.Luna has a significant percentage of the Earth’s mass a. 1/4 th the diameter

Earth is a two-planetary system with its moon Luna. 1.Luna has a significant percentage of the Earth’s mass a. 1/4 th the diameter b. About 1.6% of the mass of Earth

Earth is a two-planetary system with its moon Luna. 1.Luna has a significant percentage of the Earth’s mass a. 1/4 th the diameter b. About 1.6% of the mass of Earth 2.Similar creation a. Both created from same event

Earth is a two-planetary system with its moon Luna. 1.Luna has a significant percentage of the Earth’s mass a. 1/4 th the diameter b. About 1.6% of the mass of Earth 2.Similar creation a. Both created from same event b. They interact with each other

Earth is a two-planetary system with its moon Luna. 1.Luna has a significant percentage of the Earth’s mass a. 1/4 th the diameter b. About 1.6% of the mass of Earth 2.Similar creation a. Both created from same event b. They interact with each other i. Luna causes tides on Earth ii Earth tidally locked Luna

Earth has one significant moon, and other not so significant

There are orbiting objects at the Lagrangian points, but calling them moons may be a bit optimistic

Features of note: 1.Only body in the solar system that has liquid surface water. a. Other bodies have subsurface water b. Water was not on Earth at its creation

Features of note: 1.Only body in the solar system that has liquid surface water. a. Other bodies have subsurface water b. Water was not on Earth at its creation 2.Only planet in the Solar System that has a liquid, rotating metal core a. Causes a large magnetic field b. Protects planet from cosmic rays of all sorts

Features of note: 1.Only body in the solar system that has liquid surface water. a. Other bodies have subsurface water b. Water was not on Earth at its creation 2.Only planet in the Solar System that has a liquid, rotating metal core a. Causes a large magnetic field b. Protects planet from cosmic rays of all sorts 3.Only planet with ongoing plate tectonics a. Prevents runaway greenhouse effect, like that on Venus b. Creates geologic events that resurface the Earth

Features of note: 1.Only body in the solar system that has liquid surface water. a. Other bodies have subsurface water b. Water was not on Earth at its creation 2.Only planet in the Solar System that has a liquid, rotating metal core a. Causes a large magnetic field b. Protects planet from cosmic rays of all sorts 3.Only planet with ongoing plate tectonics a. Prevents runaway greenhouse effect, like that on Venus b. Creates geologic events that resurface the Earth 4.Only planet with a reasonable atmosphere

Features of note: 1.Only body in the solar system that has liquid surface water. a. Other bodies have subsurface water b. Water was not on Earth at its creation 2.Only planet in the Solar System that has a liquid, rotating metal core a. Causes a large magnetic field b. Protects planet from cosmic rays of all sorts 3.Only planet with ongoing plate tectonics a. Prevents runaway greenhouse effect, like that on Venus b. Creates geologic events that resurface the Earth 4.Only planet with a reasonable atmosphere 5.Will die a lonely, burning death

Features of note: 1.Only body in the solar system that has liquid surface water. a. Other bodies have subsurface water b. Water was not on Earth at its creation 2.Only planet in the Solar System that has a liquid, rotating metal core a. Causes a large magnetic field b. Protects planet from cosmic rays of all sorts 3.Only planet with ongoing plate tectonics a. Prevents runaway greenhouse effect, like that on Venus b. Creates geologic events that resurface the Earth 4.Only planet with a reasonable atmosphere 5.Will die a lonely, burning death 6.Will end time as a cold, dead and lonely planet, orbiting a Sun that gives not light, warm or hope.