'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.
Measuring the total mass of our home galaxy is a tough puzzle. However, only a small percentage of this is contributed by the approximately 200 billion stars in the Milky Way and includes a 4 million solar mass supermassive black hole at the center. Gaia was designed to create a precise three-dimensional map of astronomical objects throughout the Milky Way and to track their motions. "A lot of the time, we try to understand the universe by putting it in context of the Milky Way". An global team of astronomers from the European Southern Observatory (ESO) in Garching near Munich, the British University of Cambridge, the Johns Hopkins University Center for Astrophysical Sciences, and the Space Telescope Science Institute in Baltimore, USA could at least approximately determine the weight of the Milky Way.
Taking this data, they were able to combine it with measurements of globular clusters as far away as 130,000 light years from Earth that Hubble has taken over the last decade, giving the team an enormous amount to data to work with. That means there's a pretty large margin of error in the estimate, meaning the true mass of the Milky Way may be somewhere between 0.79 and 2.29 trillion solar masses-but the current estimate is a good start. When data from Hubble and Gaia was combined, it allowed the researchers to estimate the distribution of mass in the Milky Way out to 1 million light-years from Earth. Tony Sohn, an astronomer at the Space Telescope Science Institute. Since Hubble has been observing some of these objects for ten years, it was also possible to accurately track the velocities of these clusters as well. Most large galaxies have such hangers-on, and the Milky Way is no exception. "We see the Milky Way as it is now, not as it was in the past", Watkins says. But as Phil Plait at Bad Astronomy blog notes, measuring the mass of the Milky Way is much more hard because we are inside it and can't get the big picture, literally.
'We were lucky to have such a great combination of data, ' explained Roeland van der Marel of the Space Telescope Science Institute in the US.
Pakistani women make nation proud in every walk of life: FM
Countries like the U.S. , the UK, China, Saudi Arabia and the UAE were involved in easing tensions between India and Pakistan. Jubeir's visit comes after the Crown Prince's stand-alone visits to India and Pakistan soon after the Pulwama terror attack .
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After that point, Davis said Cohen authorized him to say publicly that he would never accept a pardon and that remains true. Trump even took to Twitter and insisted that Cohen asked him directly about a pardon, and that Trump responded "no". "Mr.