ES-3c Moons, Asteroids, Comets, and Meteors. Target I can analyze the difference between Moons, Asteroids, Comets, and Meteors I can compare Pluto to.

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Presentation transcript:

ES-3c Moons, Asteroids, Comets, and Meteors

Target I can analyze the difference between Moons, Asteroids, Comets, and Meteors I can compare Pluto to the other objects in the Kuiper Belt. I can explain why Pluto is no longer considered a planet.

Moons

What are they? Composed of Rock, similar to our Moon Some have atmospheres, most do not Various sizes, some large like our moon, some very small similar to asteroids. (Phobos)

Where are they?

Moons of Mars as seen from Curiosity rover wiki/Phobos_(moon)#/m edia/File:PIA MarsMoons- PhobosPassesDeimos- RealTime.gif /d/db/Orbits_of_Phobos _and_Deimos.gif

Asteroids

What are they?

Ceres (dwarf planet) Largest object in the asteroid belt, 587 miles diameter Can it pull itself into a sphere? _______ Icy surface, with a liquid water ocean underneath This is a true color photo taken by NASA spacecraft Dawn in Early Dawn was the first space craft to orbit an extraterrestrial body. The other missions have been/are fly-bys.

Where are they?

Chesapeake Bay Impact Crater 35 million years ago

Comets

What are they? Balls of ice and metal As they approach the sun, the ice is blown back into two tails. The tails always are angled away from the sun.

Where are they?

Oort Cloud

Another perspective:

Meteors

Meteoroid, Meteor, Meteorite

Meteor Showers

Dwarf Planets Note the size of Ceres, a dwarf planet in the Asteroid belt. Size is to scale, distance is not. IAU= International Astronomical Union

Why called dwarf?

Orbits are not in the plane of the ecliptic (sun and other planets).