Our Sun

29 terms by awagner123 

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a star

What is the Sun?

Nuclear fusion

How do stars get their energy?

93 million miles

How far is the Sun from Earth?

January 1st (Perihelion)

When is the Earth closest to the Sun?

July 1st (Aphelion)

When is the Earth farthest from the Sun?

Fusion

Combines atoms of lighter elements into heavier elements.

Plasma

the 4th state of matter and is the result of great heat and pressure.

E=mc2

E = energy m = mass c = speed of light What is Einstein's equation for energy?

Photosphere

the visible surface of the Sun

Chromosphere

the inner layer of the Sun's atmosphere. It extends thousands of Km.

Corona

Sun's thin outer atmosphere

Sun Spots

Dark spots on the photosphere.

Solar Wind

a constant stream of electrically charged particles from the corona.

Auroras

caused as the solar wind passes through the Earth's magnetic field at the poles.

Coronal holes

a hole in the corona giving off huge amounts of solar wind

Solar Flares

outbursts of light from sun spots giving off large amounts of solar wind.

Magnetic Storms

caused by particles coronal holes and solar flares are added to the solar wind. These storms may interrupt cell phones, radios, TV's, etc

Ptolemy

Who developed the Geocentric Model?

Geocentric

Model predicted where planets would appear in the sky

Geocentric

means "Earth Centered"

Nicholas Copernicus

developed the Heliocentric Model

Heliocentric Model

This theory explained that the Earth was just a planet like the others orbiting around the sun

Heliocentric

means "Sun Centered"

Tycho Brahe

devised his own instruments to study the Moon and Planets

Johannes Kepler

developed 3 Laws of Planetary Motion

Isaac Newton

developed the Law of Universal Gravitation

Isaac Newton

invented Calculus and modern Physics

Galileo Galilei

invented the telescope

Galileo Galilei

discovered sunspots and craters on the Moon

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