MILKY WAYMILKY WAY

Period 1Caitlin and Hiromi

Period 1Caitlin and Hiromi

From EarthFrom 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 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

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.

Milky way belongs to a Local Group.

*smaller group of 3 large and over 30 small galaxies.

Second largest after the Andromeda Galaxy M31.

Milky way belongs to a Local Group.

*smaller group of 3 large and over 30 small galaxies.

Second largest after the Andromeda Galaxy M31.Andromeda

Milky Way

The Spiral Of the Milky Way Contains:

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)

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 ?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

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!Interesting Facts! There have been

supernova’s in the Milky Way at irregular intervals of time.

Suns orbit the Milky Way’s core at extremely high speed(4,800 meter per second)

There have been supernova’s in the Milky Way at irregular intervals of time.

Suns orbit the Milky Way’s core at extremely high speed(4,800 meter per second)

http://www.youtube.com/watch?v=PLQF-4uyD4Y&feature=related

WORKCITEDWORKCITED "NASA - Milky Way Galaxy." NASA - Home. Web. 07

Feb. 2011. <http://www.nasa.gov/mission_pages/GLAST/science/milky_way_galaxy.html>.

"Milky Way." Wikipedia, the Free Encyclopedia. Web. 07 Feb. 2011. <http://en.wikipedia.org/wiki/Milky_Way>.

"The Milky Way Galaxy." SEDS | Students for the Exploration and Development of Space. Web. 07 Feb. 2011. <http://seds.org/messier/more/mw.html>.

"The Milky Way Galaxy." Center for Astrophysics and Space Sciences @ UCSD. Web. 07 Feb. 2011. <http://casswww.ucsd.edu/public/tutorial/MW.html>.

"NASA - Milky Way Galaxy." NASA - Home. Web. 07 Feb. 2011. <http://www.nasa.gov/mission_pages/GLAST/science/milky_way_galaxy.html>.

"Milky Way." Wikipedia, the Free Encyclopedia. Web. 07 Feb. 2011. <http://en.wikipedia.org/wiki/Milky_Way>.

"The Milky Way Galaxy." SEDS | Students for the Exploration and Development of Space. Web. 07 Feb. 2011. <http://seds.org/messier/more/mw.html>.

"The Milky Way Galaxy." Center for Astrophysics and Space Sciences @ UCSD. Web. 07 Feb. 2011. <http://casswww.ucsd.edu/public/tutorial/MW.html>.