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2

It is not weird. The comment is about a certain class of galaxy, and not just a class but a stage of galaxy formation and development within that class. We start with a fairly constant distribution of matter within the universe. Stars for when this matter clumps together. This clumping is going to have a fairly even distribution. Stars then clump ...


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There are hard limits on what types of gas that Mars can retain based on its temperature and mass (Graph of what gasses an astronomical body can retain). Volume wise, it's not clear. Currently Mars is still losing its atmosphere, so it can't even retain that amount of atmosphere. But if you continually added gas to Mars, there isn't an end point where the ...


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TL;DR: Turn Off point (TO) means the location of the "knee" in the HRD of clusters of stars. TAMS is an imaginary line in the HRD that is defined by the location of stars of different mass at the end of hydrogen burning. It constitutes the upper boundary of the main sequence. More details: There maybe some confusion because the terms are not completely ...


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To add to PM 2Ring's answer, there's also the phenomenon of microlensing. The point is, stars don't stay still on the sky. They move. Our Sun for example is moving around the center of the Milky Way. Therefore, even if two stars are completely aligned right now, they were not aligned in the past and likely will not be aligned in the future. In these ...


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Nice thought, but as the saying goes, space is really big. Stars have a tiny angular size when viewed from even their nearest neighbours (except perhaps in clusters & galaxy cores), so not much starlight actually gets intercepted by other stars, relative to the amount of light that gets absorbed by interstellar (or intergalactic) gas and dust. And even ...


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Gadget-2 is publicly available. Google works well to find it. According to their website, it runs also on PCs. But don't get your hopes up, a single PC doesn't have enough computing power to simulate a whole universe. You'll need a bigger machine for that. They have installation instructions on the webpage (see "Users Guide" under "Documentation"). You ...


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