gramschool

Views:
 
Category: Entertainment
     
 

Presentation Description

No description available.

Comments

Presentation Transcript

Slide1: 

Our Dynamic Star: The Sun developed by Dr. Art Poland, NASA GSFC

Galaxy: 

Galaxy The Sun is located in a spiral arm of our Galaxy, in the so-called Orionis arm, some 30,000 light-years from the center. The Sun orbits the center of the galaxy in about 225 million years. Thus, the solar system has a velocity of 230 km/s (or 830 000 km/h) Our galaxy consists of about 100 billion other stars and there are about 100 billion other galaxies

Structure of Sun: 

Structure of Sun Core Where the energy is created. Nuclear reactions burn every second about 700 million tons of hydrogen into helium. Radiation Zone Where energy is transported by radiation. Although the photons travel at the speed of light, they bounce so many times through the dense material that they use about a million years to escape the Sun. Convection Zone Energy transported by convection (just like boiling soup) where heat is transported to the photosphere.

Planets: 

Planets

The Visible Sun: 

The Visible Sun

Rocket: 

Rocket

Solar System: 

Solar System

SOHO Orbit: 

SOHO Orbit

SOHO: 

SOHO

EIT HeII CME: 

EIT HeII CME

EIT Corona Movie: 

QuickTime™ and a Cinepak decompressor are needed to se this picture. EIT Corona Movie

CDS Multi-temperature Images: 

CDS Multi-temperature Images

Magnetogram: 

Magnetogram

Comet: 

Comet

LASCO CME: 

LASCO CME

LASCO CME Movie: 

LASCO CME Movie

Question: 

Question What’s an Aurora?

Aurora: 

Aurora

CME Animation: 

CME Animation

Geospace Model: 

Geospace Model

Question: 

Question Does the Sun change with time over years? What is the cycle time?

Slide22: 

Sun-Earth System -- Driven by 11 Year Solar Cycle

EIT Solar Min-Max: 

EIT Solar Min-Max

Slide24: 

Solar Variability Can Affect Terrestrial Climate Given the massive economic impact of small changes in climate, we should fully understand both natural and anthropogenic causes of global change. During the Little Ice Age, London’s Thames River froze in winter, something that no longer happens. This 19th century engraving depicts the annual Frost Fair held on the ice-bound river, this one during the winter of 1683-84.

Slide25: 

Why do we care about the heliosphere?

Space Station: 

Space Station

Slide27: 

Living With A Star Research Network Solar Polar Orbiter L3 Solar Sentinel Solar Dynamics Observatory Pole Sitter Radiation Belt Mappers Ionospheric Mappers L1 Solar Sentinel L5 Solar Sentinel L2 Distributed network of spacecraft providing continuous observations of Sun-Earth system •Solar Dynamics Network observing Sun & tracking disturbances from Sun to Earth. •Geospace Dynamics Nework with constellations of smallsats in key regions of geospace.

SOHO Home Page: 

SOHO Home Page sohowww.nascom.nasa.gov

Slide29: 

END

authorStream Live Help