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Not really, for the same reason that you cannot travel west by jumping up in the air and let Earth rotate underneath you, such that you land a little farther to the west. The reason is that standing on Earth's surface, you already have a velocity toward the east which matches exactly the speed of the surface. Thus, in the reference frame of Earth, you ...


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I'm not sure exactly how to answer this, but certainly most of what you see is local. In the southern hemisphere we see the "milky Way" as a kind of lighter smudge across the sky: http://s.ngm.com/2010/12/milky-way/img/milky-way-galaxy-615.jpg, but that's probably still only a small fraction of the Milky-way, probably mostly the closest arm. The ...


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An average eye can see about 4000 objects in the night sky. The brightest are planets from the Solar system, and almost all others are stars from our galaxy, the Milky Way. Some other galaxies may be spotted, but very few. Even accounting for just half the sky, that is a very very tiny proportion of our galaxy, estimated to contain between 100 and 400 ...


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From personal experience - yes your Stellarium picture looks like a good dark sky in the Canary Islands. Certainly, the Milky Way is plainly visible, with lots of detail available to the dark-adapted eye. I more frequently view from the top of La Palma, which suffers a little less light pollution than Teide to the East. The Canarian sky law was largely ...


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This is actually a really, really tough question. Look at this diagram: Purple: Norma Arm and Outer Arm. Green: Scutum-Centaurus Arm Pink: Carina-Sagittarius Arm Cyan: 3 kpc Arm and Perseus Arm So we can slightly modify this picture by saying that there are four arms, and calling them by the following names: Norma-Outer Arm This arm has one end at ...


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The mass will be slightly less than the combine masses of the 2 galaxies since some of the stars will be hurled away. Since the disks of the galaxies are at an angle to each other, the volume would be (roughly) the volume of the 2 galaxies as they collide. Eventually, the volume will decrease (I'm guessing to between 60 to 70%) as the stars adapt to their ...



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