MILKY WAY Period 1 Caitlin and Hiromi Period 1 Caitlin 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.  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 Way  The 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.  The 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.

FMilky way belongs to a Local Group. *smaller group of 3 large and over 30 small galaxies. FSecond largest after the Andromeda Galaxy M31. FMilky way belongs to a Local Group. *smaller group of 3 large and over 30 small galaxies. FSecond largest after the Andromeda Galaxy M31. Andromeda Milky Way

The Spiral Of the Milky Way Contains : F Interstellar matter F Diffuse nebula F Young stars F Open star clusters F Old stars (located on the bulge areas) FGlobular star clusters (located on the bulge areas) F Interstellar matter F Diffuse nebula F Young stars F Open star clusters F Old stars (located on the bulge areas) FGlobular star clusters (located on the bulge areas)

Where Are We ?

F Located within the outer regions. F 20 light yrs above the equatorial symmetry plane. F Situated within a smaller spiral arm called the Local or Orion Arm F about 28,000-26,000 light years away from Galactic Center F Located within the outer regions. F 20 light yrs above the equatorial symmetry plane. F Situated within a smaller spiral arm called the Local or Orion Arm F about 28,000-26,000 light years away from Galactic Center

Interesting Facts! F There have been supernova’s in the Milky Way at irregular intervals of time. FSuns orbit the Milky Way’s core at extremely high speed(4,800 meter per second) F There have been supernova’s in the Milky Way at irregular intervals of time. FSuns orbit the Milky Way’s core at extremely high speed(4,800 meter per second)

WORKCITED F"NASA - Milky Way Galaxy." NASA - Home. Web. 07 Feb F"Milky Way." Wikipedia, the Free Encyclopedia. Web. 07 Feb F"The Milky Way Galaxy." SEDS | Students for the Exploration and Development of Space. Web. 07 Feb F"The Milky Way Galaxy." Center for Astrophysics and Space UCSD. Web. 07 Feb F"NASA - Milky Way Galaxy." NASA - Home. Web. 07 Feb F"Milky Way." Wikipedia, the Free Encyclopedia. Web. 07 Feb F"The Milky Way Galaxy." SEDS | Students for the Exploration and Development of Space. Web. 07 Feb F"The Milky Way Galaxy." Center for Astrophysics and Space UCSD. Web. 07 Feb