The weight of the galaxies can be determined accurately

Scientists have finally managed to accurately measure the mass of the galaxies Andromeda and the milky Way, which was the reason for that was disproved a theory about their identity as it had previously been considered. To prove this, the specialists had to create a computer model around these galaxies rotate smaller galaxy.

That is, making the measurement of their velocity, defining the position and studied the movement was able to collect data that helped to understand the structure of the Andromeda galaxy there is another milky way, and calculate their exact mass.

"Was that the view of the almost identical mass and identical to the structure that existed prior to this experiment, is erroneous. The mass of our milky Way almost twice less than the mass of the Andromeda galaxy. Moreover, dark matter accounts for the bulk of it. The number in the Andromeda more as well as her mass doubled." — the authors of this study.

Moreover, the study "satellite galaxies" orbiting these galaxies allowed scientists to measure the expansion of the Universe, which surprisingly coincides with the extension within the local group of galaxies. From this it is concluded that it occurs very close to us. The next challenge posed scientists to simulate dark matter in the milky Way, to understand deeper the interaction of gravity and dark matter.

Source: planetologia.ru/