MILKY WAY Period 1 Caitlin and Hiromi Period 1 Caitlin and Hiromi
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MILKY WAYPeriod 1Caitlin and Hiromi
From Earth The Milky Way appears as a hazy band of white light in the sky during the nights. It divides the night sky into two somewhat equal hemispheres.
The Milky Way consists of at least 200 and maybe as many as 400 billions stars.It is spread out as a thin disk, and from the outside it would look like a spiral galaxy.
Stars in the Milky WayThe oldest star in Milky Way is estimated to 13.2 billion years, nearly as old as the Universe itself.There should be hundreds of dwarfs, small galaxies, gravitationally bound to the Milky Way, but only about 20 dwarfs have been observed.
Milky way belongs to a Local Group.*smaller group of 3 large and over 30 small galaxies.Second largest after the Andromeda Galaxy M31.
The Spiral Of the Milky Way Contains: Interstellar matter Diffuse nebula Young stars Open star clusters Old stars (located on the bulge areas)Globular star clusters (located on the bulge areas)
Where Are We ?
Located within the outer regions. 20 light yrs above the equatorial symmetry plane. Situated within a smaller spiral arm called the Local or Orion Arm about 28,000-26,000 light years away from Galactic Center
Interesting Facts! There have been supernovas in the Milky Way at irregular intervals of time.Suns orbit the Milky Ways core at extremely high speed(4,800 meter per second)
WORKCITED"NASA - Milky Way Galaxy."NASA - Home. Web. 07 Feb. 2011. ."Milky Way."Wikipedia, the Free Encyclopedia. Web. 07 Feb. 2011. ."The Milky Way Galaxy."SEDS | Students for the Exploration and Development of Space. Web. 07 Feb. 2011. ."The Milky Way Galaxy."Center for Astrophysics and Space Sciences @ UCSD. Web. 07 Feb. 2011. .