Sai Fact

 Charless-Augustin de Coulomb (1736-1806)  was a French physicist. He is best known for developing Coloumb's law, the definition of the electrostatic force of attraction and repulsion. The S1 unit of charge, the Coulomb, was named after him. Coulomb's inverse square law, is a lew of physics describing the electrostatic interaction between electrically charged particles.

 Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. ... Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water.

 Agriculture is the practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. ... Pigs, sheep, and cattle were domesticated over 10,000 years ago.

 Core The dense galactic core is filled with older stars and clouds of sooty dust the leftovers of dying stars. 4.3 LIGHT YEARS- Alpha Centauri Closest neighboring star system 8.6 LIGHT-YEARS- Sirius Brightest star in the sky 433 LIGHT YEARS- Polaris North star 1,345 LIGHT YEARS- orion Nebula One of the brightest nebulae Earth and our solar system  lie in the Milky Way's Orion Arm, a smaller spur between two of the galaxy's major arms. Galactic Arms The Milky Way's pinwheeling arms form its newer neighborhoods, home to younger stars. Share it, Information should be free 

 How LONG DOES IT TAKE OUR SOLAR SYSTEM TO ORBIT THE CENTER OF THE GALAXY? About 230 million years, a "galactic year."

 What's our nearest neighboring spiral galaxy? That would be Andromeda, a spiral galaxy like the Milky Way Astronomers believe it contains as many as a trillion stars. At 2.5 million light-years away. Andromeda is the farthest thing we can see with the naked eye, but it's getting closer all the time. Someday, the Milky Way and Andromeda galaxies will collide, sharing their star dust and spawning new stars. It's doubtful any humans will see this cosmic collision, which won't happen until four billion years in the future. How far is Earth from the center of the Milky Way? About 27,000 light years (A light year is a unit of astronomical measurement for distances between stellar objectscone light-year is how far light travels in a year)

 What LIES AT THE VERY CENTER OF THE GALAXY? Astronomers suspect that a super-massive black hole churns at the core of our galaxy-and perhaps at the cores of all other galaxies in the universe.