Turns out there are weather forecasts for space as well. A new study of a collection of nearby stars that seem to all be moving in the same direction has led scientists to believe that a large swathe of dark matter (not to be confused with anti-matter) is about to whiz past Earth. The dark matter is hypothesized to be the remnant of a dwarf galaxy that was swallowed by the Milky Way some billions of years ago and has been named S-1. The S-1 stream is expected to blow past Earth at a speed of 500km/s, or roughly 1500 times the speed of sound or 1/1000th the speed of light. Any which way you look at it, it's going to move fast. Dark Matter is what scientists believe makes up for most of the universe, but is a particle not yet understood by science.
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