http://en.wikipedia.org/wiki/Milky_Way
The Milky Way is the galaxy that contains our Solar System. Its name “milky” is derived from its appearance as a dim glowing band arching across the night sky in which the naked eye cannot distinguish individual stars.
From the Earth, the Milky Way appears like a band because its disk-shaped structure is viewed from within the Galaxy. Galileo Galilei first resolved the band of light into individual stars with his telescope in 1610.
The Milky Way is a barred spiral galaxy some 100,000–120,000 light-years( See Below) in diameter which contains 100–400 billion stars. It may contain at least as many planets as well.The Solar System is located within the disk, about 27,000 light-years away from the Galactic Center.
There are 400 Billion(40000 crores) Planets approx in the milky way. Earth is just one of the planets.
The are infinite galaxies like milky way in our universe.
Light Year
http://en.wikipedia.org/wiki/Light-years
A light-year (symbol: ly), sometimes written light year or lightyear, is a unit of length used in astronomy, though it is sometimes mistaken for a unit of time. It is equal to just under 10 trillion kilometres (or about 6 trillionmiles).As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year.
An image of the Milky Way in the night sky aboveParanal Observatory. The guide-star laser is aimed at the Galactic Center.
The Milky Way is the galaxy that contains our Solar System. Its name “milky” is derived from its appearance as a dim glowing band arching across the night sky in which the naked eye cannot distinguish individual stars.
From the Earth, the Milky Way appears like a band because its disk-shaped structure is viewed from within the Galaxy. Galileo Galilei first resolved the band of light into individual stars with his telescope in 1610.
The Milky Way is a barred spiral galaxy some 100,000–120,000 light-years( See Below) in diameter which contains 100–400 billion stars. It may contain at least as many planets as well.The Solar System is located within the disk, about 27,000 light-years away from the Galactic Center.
There are 400 Billion(40000 crores) Planets approx in the milky way. Earth is just one of the planets.
The are infinite galaxies like milky way in our universe.
Light Year
http://en.wikipedia.org/wiki/Light-years
A light-year (symbol: ly), sometimes written light year or lightyear, is a unit of length used in astronomy, though it is sometimes mistaken for a unit of time. It is equal to just under 10 trillion kilometres (or about 6 trillionmiles).As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year.
An image of the Milky Way in the night sky aboveParanal Observatory. The guide-star laser is aimed at the Galactic Center.
A view of the Milky Way towards the constellation Sagittarius (including theGalactic Center) as seen from a non-light polluted area (the Black Rock Desert, Nevada)
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