* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Star/Sun/Spectral Analysis - ppt
Survey
Document related concepts
History of astronomy wikipedia , lookup
Archaeoastronomy wikipedia , lookup
Equation of time wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Observational astronomy wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
Astronomical unit wikipedia , lookup
Solar System wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Hebrew astronomy wikipedia , lookup
Tropical year wikipedia , lookup
Transcript
Star A ________________ is a huge mass made of very hot gases (____________________ Hydrogen and ____________________) Helium which produces energy through ________ process, and Nuclear ___________ Fusion then emits such energy in the form of radiation What is the closest star to Earth? SUN Proxima Centauri is the next closest at 4.2 light years away What is the sun made of? Hydrogen 73% ___________________ Helium 25%____________________ Is it a big star? No, it is an average (medium) size star CORONA CORE RADIATIVE CONVECTIVE CHROMOSPHERE The Sun’s Interior Core: __________ has a tremendously high temperature and pressure. The temperature is roughly 15 million °C. Here is where nuclear fusion occurs, turning four hydrogen nuclei into a single helium nucleus plus a LOT of energy. http://www.windows.ucar.edu/tour/link=/sun/Solar_interior/Sun_layers/Convection_zone/sun_conv_big_jpg_image.html The Sun’s Interior Radiative Zone: _____________________emits radiation. that spreads outwards. The temperature ranges from 15 million °C to one million °C. It may take photons of radiation millions of years to pass through the radiative zone, as they gradually make their way out http://www.windows.ucar.edu/tour/link=/sun/Solar_interior/Sun_layers/Convection_zone/sun_conv_big_jpg_image.html The Sun’s Interior Convective Zone: ____________________ the photons continue to travel outwards via convection (towards lower temperature and pressure). The temperature ranges from one million °C to 6,000 °C. http://www.windows.ucar.edu/tour/link=/sun/Solar_interior/Sun_layers/Convection_zone/sun_conv_big_jpg_image.html Outer Layers of the Sun Photosphere Chromosphere Corona Photosphere ________________: Surface of the sun (lower atmosphere) • Consists of a layer of glowing gas (300 miles thick) which radiates most of the _____________ we see. light • The temperature is about 5,500 °C • It has a thick grainy texture consisting of numerous, granules relatively small, bright markings called ____________. ____________ Sunspots are cool, dark spots on the surface. They are much bigger than the Earth. They occur in a 11-year cycles. http://www.enchantedlearning.com/subjects/astronomy/sun/sunspots.shtml ________________ Chromosphere is the layer above the photosphere. •It is a very thin layer that appears reddish in color • Temperatures ranging from 6,000 °C (at lower altitudes) to 50,000 °C (at higher altitudes). •This layer is a few thousand miles thick. Corona ________________ is the layer above the chromosphere. •The corona extends for millions of miles •Temperatures are tremendous, reaching one million °C. http://zebu.uoregon.edu/~soper/Sun/chromosphere.html Solar flare _______________ is a magnetic storm which includes a sudden, rapid, and intense variation in brightness. Radiation is emitted across almost the entire electromagnetic spectrum. _______________________ Solar Prominence is an arc of gas that erupts from the surface of the Sun. They form magnetic loops that hold relatively cool, dense gas suspended above the surface of the Sun. Solar Wind The top of the corona is constantly flowing into space, where it becomes _________ Solar ____________. wind How do we know what elements are in the sun and other stars? By using spectroscopy Spectroscopy ______________: the study of the spectrum of luminous beams and began back in the 19th century. • Separates various components of beams of light, different wavelength • Figures out the chemical composition of stars • Spectrum shows absorption lines (absorbs that wavelength of light) • These lines show what elements are in the stars (spectral types). http://www.enchantedlearning.com/subjects/astronomy/