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So, are there lots of Price Price Baby Mark Price signature retro shirt systems like our own? We don’t know. Are systems like ours the only place life, especially intelligent life, can develop? We don’t know. Unfortunately, this area of science is still in the tedious process of collecting sufficient data to make reliable predictions. We know for certain there are exoplanets out there, and there are LOTS of them. The chance that some of them are like Earth is very high. The chance of finding lots of star systems similar to our own is also pretty high; there is no reason to assume we are unique. As our techniques for finding exoplanets get better, as we build better telescopes and better ways of interpreting the data they deliver, we will almost certainly find star systems very like our own. It will just take time.

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This is completely correct. The Big Bang model suggests that all structures in the Price Price Baby Mark Price signature retro shirt, from super clusters down to dwarf galaxies are built bottom up, by the contestant merging of smaller clumps of stars, gas and dark matter. The statistics and nature of this merging process is at the heart of modern cosmology and can be used to discriminate against different types of dark matter and different idea about how galaxies form. The currently favored idea is that the smallest clump that can be made by direct collapse after the Big Bang is about the size of an earth – galaxies are built as clumps of this size merge to make bigger and bigger clumps. Some of these mergers are quite violent and stars can be flung to great distances like when an astroid strikes a planet- blobs of debris can be shot into outer space. Rogue stars are the galactic debris that’s wandering though space trying to get back to the galaxy that expelled it, but can’t (necessarily). The nature if the rogue star population depends on the merger history of the Milky Way. We don’t know this exactly but we can make some inferences. The Milky Way galaxy shows no real signature of a merger (like a bulge of stars). In fact it’s relatively thin disc can rule out a recent big merger. Thus the rogue stars that populate our “halo” would have to be old, dim red stars having formed along time ago. This is consistent with a lack of any strong UV emission (which comes from young hot stars) in the halo (although the brightness (or density) of these rogue stars is just barely detectable.)
