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(8)  Earth and space. The student knows characteristics of the universe. The student is expected to: (A)  describe components of the universe, including stars, nebulae, and galaxies, and use models su

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samantha villanueva

on 31 March 2011

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Transcript of (8)  Earth and space. The student knows characteristics of the universe. The student is expected to: (A)  describe components of the universe, including stars, nebulae, and galaxies, and use models su

(8.8)  Earth and space. The student knows characteristics of the universe. The student is expected to:
(A)  describe components of the universe, including stars, nebulae, and galaxies, and use models such as the Herztsprung-Russell diagram for classification;
(B)  recognize that the Sun is a medium-sized star near the edge of a disc-shaped galaxy of stars and that the Sun is many thousands of times closer to Earth than any other star;
By: Christina Limon and
Samantha Villanueva;) Earth and Space TEKS Irregular Galaxy: galaxies who don't really have a specific shape,they come in many different shapes.
Galaxy: large group of stars, dust, and gas held together by gravity; can be Elliptical, Spiral, or Irregular. Spiral Galaxy: galaxies with spiral arms that wind outward from inner regions. These arms are made up of bright stars and dust. Elliptical Galaxy: galaxy shaped like large 3D ellipses or footballs. Universe: all existing matter, space, and everthing in it. The universe is made up of different types of galaxies such as.... Can you name these galaxies?;D Nebulae: large cloud of gas and dust that contracts under gravitational force and breaks appart into smaller pieces, each of which will collapse to form a star. Pulsar:A type of star that gives off regular rapid pulses of radio-waves. Quasar: a point, no more than one light year in diameter that emits tremendous amounts of energy, as much as hundreds of galaxies. Current hypotheses suggest that quasars are powered by super massive black holes. Black Hole: is a region of space from which nothing, not even light, can escape. The Milky Way: is the galaxy in which we live in. It is agreed that the Milky Way is a spiral galaxy. It is home to our solar system,which is found on one of the galaxy's arms called Orion. The Hertzsprung-Russell Diagram: Is a diagram that represents each star as a dot. There are lots of stars out there, so there are lots of dots. The position of each dot on the diagram tells us two things about each star: its luminosity (or absolute magnitude) and its temperature. Luminosity: is the measure of brightness. Absolute Magnitude: measure of amount of light a star actually gives off. While Apparent Magnitude: is the measure of the amount of a star's light received on Earth. The developers of The Hertzsprung Russell Diagram were "Ejnar Hertzsprung", and "Henry Norris Russell". In our solar system, Earth orbits (path as it revolves around the sun. The Sun (the center of our Solar System) while the Moon acts as a satelite to Earth. Earth is tilted on its axis at 23.5 degrees causing seasons. It goes through one rotation in 24 hrs and a revolution in 365.25 days, which is why we have an extra day every 4 years, called a Leap Year. The Sun is a medium-sized star, 93 million miles away ,and is at the center of our solar
system, and it is the main source of energy on Earth. It the nearest star to Earth then the its Proxima Centauri. Light year:distance that light travels through space in one year The Sun produces energy by fusing hydrogen atoms into helium atoms in its core. Supernova: when the core of a star collapses A star dies by first depleting its hydrogen supply and turns into a red giant,.Then the star collapses turning into a white dwarf, afterwards the helium is exhausted and the core contarcrts to a small star. If the star is big enough it turns into a supergiant and when its core crashes inward it turns into a supernova then after that a Neutron Star. NASA uses satalites for information about space, and if it can cause hazards to us. Winter
Solstice Summer
Soltice Vernal Equinox Autumnal Equinox THE END:) Enjoy the videos coming up...
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