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Other objects in the Solar System

Other objects in the Solar System. Describe characteristics of the moon. Describe asteroids Describe meteors and meteorites. Describe comets. KEY WORDS Moon Lunar Satellites Comet Asteroid Meteoroid Meteorite Meteor . Io - only moon known to have active volcanoes

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Other objects in the Solar System

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  1. Other objects in the Solar System

  2. Describe characteristics of the moon. • Describe asteroids • Describe meteors and meteorites. • Describe comets KEY WORDS Moon Lunar Satellites Comet Asteroid Meteoroid Meteorite Meteor

  3. Io- only moon known to have active volcanoes Europa– contains more ice and water than Earth and may contain life.

  4. Moons

  5. (Oct 2008)– 172knownnatural moons orbiting planets in our Solar System.

  6. Moon: Large natural object (rock/metals) that revolves around a planet – also called a satellites. • Roman goddess of the moon was Luna. • Most moons were discovered with telescopes. • Probes (robot explorers) have investigated moons of Mars, Jupiter and Saturn. • Studying moons helps us learn about the origin and evolution of the solar system.

  7. Humans have visited its surface six times between 1969 and 1972. • First visit - SovietLuna 2 in 1959. • 2nd brightest object in sky. • No atmosphere • Surface filled with hills, valleys, and craters. • ¼ diameter of Earth • Its gravity is responsible for the tides of the oceans.

  8. Asteroids

  9. Asteroids: Chunks of rock/metal that orbit the Sunbut too small to be planets – minor planets. • “Asteroid belt” in large gap from Mars - Jupiter. • Largest is only 1000 Km in diameter. • Asteroids are rich in minerals – future mining. • Asteroid with orbits that cross paths with Earth are called Trojans. • Could cross close enough to be pulled in by Earth’s gravity and collide with it.

  10. Meteoroids

  11. Meteoriods: lump of rock that is trapped by Earth’s gravity and pulled into the atmosphere. • As it falls, it rubs again molecules of air (friction) and becomes hot and breaks apart (vapourizes) so the air glows – burns up. • Meteoroid that completelyburns up - meteor. • Streak of light produced across the sky called also known as a shooting star. • The largest are probably asteroids.

  12. Meteoroids that don’t completely burn up and strikes the Earth, it is called a meteorite. • Large meteorites make craters. • Westhawk Lake is a crater. Crater in Arizona formed by meteorite

  13. Meteor shower Swarm of visible meteors when Earth passes through debris left behind by old comet.

  14. Comets

  15. Comets: chuck of ice/dust that orbit the Sun. • Made of the head (coma) and the tail. • Approach the Sun - warmed by solar radiation. • Heated material becomes glowing gas that is blown out by solar wind forming the tail – millions of km long. • Some comets have regular periods of revolution around the Sun. • Halley’s comet: last seen in 1986 it has a period of 76 years.

  16. 10 Ways the World Will END!

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