How real is Laura Mersini-Houghton a physics professor from University of North Carolina theory about the Great Void?

Speaking of distance in the form of light years is often times hard for the average person to wrap their minds around. A light year, however, is a measure of distance, and it represents how far light can travel in one year. The velocity of light is approximately 300,000 kilometers each second! That is a staggering number, but that being said, in one year, light can travel about 10 trillion kilometers. Kilometers are an adequate measure of what goes on here on earth, but they fast become near useless when we are confronted with explaining the vastness of the galaxy. For this reason, light year becomes a useful measure when the numbers become just too big to write. For example, the distance to the next big galaxy, Andromeda, is 21 quintillion kilometers. …

The Milky Way is a system of gravitationally bounded stars, white dwarfs, neutrons stars, black holes, interstellar gas, dust and dark matter in our solar system.

From Earth Milky Way appears as a band of light 30 degrees wide arching across the sky because it’s disk-shaped structure.

In 1610, Galileo was the first one who discovered that the band of light has individual stars. Until 1920, astronomers thought that all the stars in the universe are contained in the Milky Way, but after a lot of debates, astronomer Edwin Hubble showed that the Milky Way is just one of the many Galaxies from the 200 billion galaxies in the Universe.

The Milky Way is a galaxy in shape of a spiral with the central bar-shaped that is a diameter between 100.000 to 180.000 light years ( 1 light year is about 6 trillion miles)

The disc is shaped as …