Our Star The Sun C. Alex Young NASA Goddard Space Flight Center July 21, 2006 NASA GSFC Visitor’s Center.

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Presentation transcript:

Our Star The Sun C. Alex Young NASA Goddard Space Flight Center July 21, 2006 NASA GSFC Visitor’s Center

What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

Our Star the Sun The Sun is a star. Ball of rotating hot gas with a nuclear fusion core. It is our energy source - it drives the Earth

Through a camera

Why study the Sun?

What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

The Milky Way

Types of stars

What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

The Solar System

Earth sized planets

Gas giants

The Sun

Solar facts diameter Earths (1.4 million km) circumference Earths volume - 1,300,000 Earths distance from Earth million km surface temperature C

What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

Parts of the Sun

From the inside out

Sound waves in the Sun

Surface oscillations

Interior imaging

Sunspot layers

Parts of the Sun

Sunspots

Filaments

Prominences

The Corona

The Solar wind and the heliosphere

What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

Magnetic field

Plasmas

Examples of plasmas

Differential rotation

Text Magnetic loops

The magnetic carpet

Dynamic Sun

Flares and CMEs

The solar cycle

High energy flare

Space Weather Terrestrial Power Systems Spacecraft charging Astronauts can experience radiation exposure in high inclination orbits and outside the Earth’s magnetosphere

What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

Total Solar Eclipse

Path of totality

Annular Solar eclipse

2006 Eclipse sequence

Partial 1/3 of Sun

Partial 2/3 of Sun

Partial almost totality

Diamond Ring

Inner Corona

Middle Corona

Outer Corona and Moon

Composite - 22 images

Composite - 26 images

Diamond Ring

12 min. after totality

27 minutes after

Almost over

Lunar Eclipse

2000 Eclipse

Lunar eclipse movie

Thank you!

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