The "Milky Way" .. Its dust and black hole are bigger than the sun 4 million times

Scientists finally reached the size and weight of the Milky Way galaxy, with all its stars, dust, gases, planets, and black holes, the Guardian reported.
Astronomers have made calculations more accurate than ever on the size and weight of our so-called Milky Way or Milky Way.
According to recent scientists, the Milky Way galaxy contains more than 1.5 billion stars or sun, and scientists explain almost everything, including stars, planets, cosmic dust, gases and the gigantic black hole in the center of the galaxy, about four million times bigger than the sun. The weather.
"This includes almost everything in the Milky Way," said astronomer Loire Watkins, who works at the headquarters of the European Astronomy Observatory south of the city of Garscheng, Germany. "Knowing your total weight will help us better understand the galaxy."
Scientists have been trying to calculate the weight of our galaxy for decades, and have concluded that the number of suns and stars in the Milky Way ranged from 500 billion to three trillion stars.
It should be noted that the latest estimate of scientists is an average number of previous estimates, which can be converted into weight equivalent to 3 trillion trillion trillion.
To determine the weight of the galaxy, Watkins and his colleagues collected data from the Hubble Space Observatory and the JIA Satellite of the European Space Agency, an observatory that records the positions of stars to produce a map in three dimensions of the galaxy of the Milky Way.
Scientists have also used observatories and telescopes to measure the movement of 46 star clusters and various groups of hundreds of thousands of stars orbiting around the center of the galaxy.