solar system & planets
TRANSCRIPT
The Universe, Solar System, and Planets I
Edwin Hubble at Mt. Wilson
Hubble guiding the Hooker100 inch telescope in 1923.
The Hooker 100 inch telescope atop Mt. Wilsonnear Pasadena, CA. It was the largest telescope in the world from 1917-1947.
A deep image of an “empty”portion of the sky with theHubble Space Telescopereveals that the universe isfilled with galaxies- many justlike our own. The lightwe see from the most distantgalaxies has traveled approx-imately 10 billion years to reach us.
Deep Hubble Space Telescope Image
The Solar System - Its The Solar System - Its Origin and Early Origin and Early
DevelopmentDevelopment
Our solar Our solar system, part of system, part of the Milky Way the Milky Way galaxy, consists galaxy, consists of the Sun, nine of the Sun, nine planets, 64 planets, 64 known moons, known moons, many asteroids, many asteroids, millions of millions of comets and comets and meteorites, as meteorites, as well as well as interplanetary interplanetary dust and gasesdust and gases
Vocabulary
• To magnify: To make an object
appear larger
• A telescope: A tool that makes
distant objects appear larger, brighter and sharper.
• The sun:Nearest star to Earth.
• Orbit: To move in a path
around the sun.
• Planet: A large body in
space that moves around a star
• Moon: A small rounded
body in orbit around a planet.
• Solar system: It is made up
of the sun, planets, moons and other objects that orbit the sun.
• Space probe: A craft that helps
scientists explore outer space.
A galaxy: A collection of
stars, gas and dust bound together by gravity
• A comet: A small frozen
mass of gas and dust revolving around the sun
Asteroids-Meteorites Visitors from Outer Space
– Stones - composed of iron and magnesium silicates, about 93% of all meteorites
– Irons - composed of iron and nickel alloys– Stony-Irons - nearly equal amounts of iron and nickel
and silicate minerals
• Asteroids are rocks that revolve around the sun, when the rock breaks the layers of planet Earth they become shooting stars.
• Meteorites are believed to be pieces of material that originated in the formation of the Solar System about 4.6 billion years ago
Movements of planet Earth
• Rotation: The Earth spins
around its own axis• Revolution: The Earth revolves
around the sun.
