World Water Day is an annual UN observance day (always on 22 March) that marks the importance of freshwater. The Water Day is celebrated around…
Do you know how much the Milky Way weighs? If it interests you then keep reading this article as it is about the weight of Milky Way.
We just can’t detect dark matter directly,” Laura Watkins, of the European Southern Observatory in Garching, Germany, said in a statement. “That’s what leads to the present uncertainty in the Milky Way’s mass — you can’t measure accurately what you can’t see!”
The weight of Milky Way is about 500 billion times the mass of our sun to 3 trillion solar masses. The number is so tough to pin down because about 85 percent of the Milky Way’s mass is made up of dark matter.
“The more massive a galaxy, the faster its clusters move under the pull of its gravity,” study co-author N. Wyn Evans, of the University of Cambridge in England, said in the same statement.
Watkins and her colleagues stated in a new study as they measured the velocities of globular clusters, clumps of stars that orbit the Milky Way’s familiar spiral. Watkins is lead author of the new study, also he has been accepted for publication in The Astrophysical Journal.
“Most previous measurements have found the speed at which a cluster is approaching or receding from Earth — that is, the velocity along our line of sight,” Evans added. “However, we were able to also measure the sideways motion of the clusters, from which the total velocity, and consequently the galactic mass, can be calculated.”
As researchers mentioned that the team studied the motion of 46 globular clusters, 34 of which Gaia observed and 12 Hubble measured. The most distant of these stellar clumps lies about 129,000 light-years from Earth.
Here you may read all the articles connected to our own Galaxy “Milky Way Galaxy”.
Source: Text; www.space.com
Image credit; wallpaperstudio10.com
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