The Merging of Galaxies

The dwarf galaxy is "a small galaxy with billions of stars - a smaller number than the 200 to 40 billion stars of our Milky Way galaxy" (Wikipedia). According to the report, February 23, 2014, the two galaxies that had circulated the Andromeda galaxy merged. In Andromeda 's Dwarf galaxy Andromeda Galaxy II, a series of stars was formed by the impact. Researchers then sorted stars into categories and tried to analyze that it might be a member of Andromeda Galaxy II rather than those dwarf foreground stars that might be "Milky Way Hello" .

The gravity draw of the local group galaxies and most, if not all, of the clusters of galaxies was finally named after the two largest galaxies of the local group, the "galaxy". This event will occur within about 4 billion years

After billions of years, we will join the Andromeda galaxy. However, this is insignificant compared to the accumulation of the universe that occurs in this distant cluster of galaxies where 14 separate large galaxies gather. It is a big surprise for astronomers to see such large groups gather very fast. Because the distance between the stars is too large, it may take several generations to reach the nearest star. A cool idea is to use asteroids as spacecraft and to minutely process them for hundreds of years to provide travelers with the resources they need to travel. Please check this article by Ian O'Neill.

Space news on May 4, 2018: NASA canceled monthly cars about Gaia's 1.7 billion stars, the dream of the super telescope, and so on.

According to Comerford, there are two possibilities. First, when the two galaxies merge, the tides and gravity circled around the black hole and scattered the surrounding stars. But there is a slightly strange explanation that fills the gap in our knowledge of how black holes grow. In black hole astrophysics, we know the "stellar mass" black hole - basically 5 to 100 solar mass black holes are left behind a massive supernova. Millions to millions (and even billions) solar mass. You may have noticed a big quality gap between these two types of black holes. When the black hole begins to shrink and grows with time, what kind of black hole bridges the stellar mass black hole and the super monsters?