JOURNAL #20 – THE SUN

1. Name one part of the sun.2. Is the sun a solid, liquid or gas?3. How hot was the center of the sun

when it officially became a star?

THE SUN

Objective: Understanding the composition of the sun and phenomena that occurs there.

PARTS OF THE SUN

PARTS OF THE SUN

Chromosphere – layer of the atmosphere above the photosphere

Convection Layer – transports heat by rising currents of hot gas

Corona – largest/hottest layer of the atmosphere (1 million K)

PARTS OF THE SUN

Photosphere – “surface” of the sun; gives off light

Prominence – eruptions on the solar surface

Radiation Layer – energy from fusion in the core moves outward

SOLAR PHENOMENA

Solar Flare – eruption that ejects high energy particles

Solar Wind – hot gases (ionized hydrogen) blow from the corona

Sun Spots – cool, dark areas on the solar surface

THE SUN

Sun produces energy by nuclear fusion

Sun is a gas and rotates at different speeds Equator: 25-27 days Poles: 31-35 days

SYSTEMS OF STARS

Binary System – when two stars orbit each other Our sun IS NOT a binary system