13.15 Other Objects in our Solar System
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Transcript of 13.15 Other Objects in our Solar System
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13.15 Other Objects in our Solar System
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The Moon• the moon orbits Earth every 27.3
days
• the moon rotates once on its axis as it completes one orbit around Earth
• as a result, we see only one side of the moon
• The amount of illumination we see changes – the phases of the moon
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Did you know …..
The Tides
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FULL
QUARTER
CRESCENT
GIBBOUS
FOUR MAIN SHAPES
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Moon PhasesWaxing - increasing
Waning - decreasing
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Waxing Crescent
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SOLAR ECLIPSE
Occurs whenever the shadow of the Moon falls on Earth’s surface, the Moon is between the Sun and the Earth.
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SOLAR ECLIPSES
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LUNAR ECLIPSE• an event where Earth moves directly
between the Sun and Moon so that Earth casts its shadow on the Moon
Eclipses
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Asteroids
• small, non-spherical objects that are thought to be debris left over from the formation of the solar system.
• most are in the asteroid belt found between Mars and Jupiter
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Trans-Neptunian Objects
•objects beyond the orbit of Neptune
•found in the Kuiper Belt
•Pluto is found in the Kuiper Belt
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Oort Cloud
• At the farthest reaches of the Sun’s gravitational influence is a spherical cloud of icy fragments called Oort.
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Comets• Most start in the Kuiper Belt
and the Oort cloud.
• When it gets close to the Sun, the comet is warmed by solar radiation and the frozen substances become gases
• these gases are pushed outward by solar wind and radiation, forming a bright, glowing tail
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Meteoroids, Meteors, and Meteorites
• Meteoroids: pieces of rock moving through space
• Meteors: a meteoroid that reaches Earth’s atmosphere and burns up due to atmospheric friction.
• Meteorites: a meteoroid that is large enough to pass through Earth’s atmosphere and reach the ground without being totally burned up.
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HOMEWORK:• Read pg. 430 - 433
• Answer # 2 – 6, 11 on pg. 433