The Sun: Our Very Own Star

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Presentation transcript:

The Sun: Our Very Own Star Chapter 3 Section 2

Can you imagine what our life would be like if there was no sun. Takes up 99% of the mass of our solar system The Sun is a large ball that consists mainly of Hydrogen and Helium 1.3 million Earths to fill the inside of the gas giant

Life Cycle of the Sun

Characteristics Closest star to earth Center of our solar system The bright star in the center is Proxima Centauri About 4.2 light years away

Characteristics No solid surfaces Ball of Gas

Characteristics The Sun’s temperature is different in different places Core 27 Million °F Surface 9,800 °F

Characteristics Energy releaser… Each square centimeter emits roughly as much light as a 6000 Watt Lamp

Characteristics It takes 8 ½ minutes for the light from the sun to reach Earth

Structure of the Sun (pg 68) Core Radiative zone Convection zone Photosphere Chromosphere Corona

INNER ZONE Core Center of the sun NUCLEAR FUSION occurs here High temperature High pressure Gravitational Pull

INNER ZONE Radiative zone Energy moves by RADIATING OUTWARD from core to convective zone

INNER ZONE Convective zone energy transferred by CONVECTION warmer gasses RISE cooler gasses SINK

Atmosphere Photosphere gives off VISIBLE light The width of California

Atmosphere Chromosphere high activity of solar flares

Atmosphere Corona Outer most layer Blends into space Charged particles that escape corona create GLOWING HALO

Physical Features Sunspots Some as large as 50,000 miles in diameter Dark in color due to COOLER TEMPERATURES

Physical Features Sunspots 11 year cycle (observed by Galileo) Caused by powerful MAGNETIC FIELDS

Physical Features Solar Flares Violent EJECTIONS of gas Occur when sunspots move CLOSE together CREATE Solar winds

Physical Features Solar Winds CHARGED particles ejected from SUN Flow from CORE towards edge of solar system

Physical Features Solar Prominences LOOPED ejection of gas Occur when sunspots move towards each other, but don’t meet

Observing the Sun! Sun From Space

Outdoor Activity In a group of four A meter stick One orange circle (9 inches in diameter) One Manila/transparency (Earth 2 millimeters Measure the distance between earth and sun (24.5 meters apart)

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