Capella university powerpoint template

Capella

Transcript: Capella What is Capella? What is Capella? Capella is the brightest star in the constellation Auriga the Charioteer. It’s actually 2 stars, each with a golden color similar to our sun. Capella is the brightest star we see at night of the same spectral type, or color, as our daytime star, the sun. Like our sun, Capella appears as a yellow or golden star. It is the brightest yellow star visible in our sky and much bigger and brighter than our sun, but of course much farther away, about 42 light-years in contrast to the sun’s 8 light-minutes. Characteristics Characteristics Capella is a bright star in the constellation Auriga. While Capella appears as a single star to the naked eye, it actually is a group of four stars. Two large binary stars, and two fainter binary dwarfs. Capella has a spectral type of G5III. Spectral Type Spectral Type Capella has a surface temperature of 4940° Kelvin Surface Temperature Surface Temperature Capella has a luminosity 79 times the Sun. Luminosity Class Luminosity Class Capella has a mass of 2.69 solar masses or 2.7 times the mass of the sun. Mass Mass Capella is 590 to 650 million years old. Age Age Capella is a Yellow Type-G Giant Star. Stage of Life Stage of Life HR Diagram HR Diagram Life Cycle Life Cycle The first stage of Capella's life cycle is a nebula which is a cloud of gas and dust The second stage of Capella's life cycle is a protostar which is a contracting mass of gas that represents an early stage in the formation of a star, before nucleosynthesis has begun. Capella's third and currents stage of it's life cycle is a main sequence star.Main sequence stars fuse hydrogen atoms to form helium atoms in their cores. About 90 percent of the stars in the universe, including the sun, are main sequence stars. These stars can range from about a tenth of the mass of the sun to up to 200 times as massive. Capella's third stage of life is a red giant. Red giants are very large stasr of high luminosity and low surface temperature. Red giants are thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion. Capella's fifth stage of life is 1a supernova. 1a supernova is a type of supernova that occurs in binary systems (two stars orbiting one another) in which one of the stars is a white dwarf. The other star will try to become a white dwarf but due to its size it cant. A super nova happens when the star sucks in a neighboring star as a last resort to stay alive. The sixth and final stage of Capella's life cycle is neutron star. It is the inner core that's left after the explosion in the previous stage. How long will Capella live? Capella's life as a star will be less than one thousandth as long the sun's will be. When was Capella discovered and who discovered it? Capella's binary nature was first discovered by professor William Wallace Campbell of the Lick Observatory in 1899 after analyzing photographic plates taken in the period from August 1896 to February 1897. Past and Present Past and Present Capella is the Latin word for ‘nanny goat,’ and which is why the star is often called the Goat Star. From mid-latitudes of the U.S. and Europe, Capella is far enough to the north to be seen at some time of the night all year round. For those in the Northern Hemisphere, it’s best in winter, when you’ll find golden Capella high overhead before you go to sleep. Some people use the Big Dipper to locate Capella. During the Middle Ages, Capella was seen as one of the Behenian fixed stars, fifteen stars that were considered a a source of astrological energy, and particularly useful for magical spells Capella is the brightest star in the constellation of Auriga. Fun Facts Fun Facts

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