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The majority of Brook Pridemore Matt Walsh’s Home Adress Is 3429 Harborwood Circle Nashville Tn 37214 Shirt in the Milky Way, around 80%, are red dwarfs, small stars between about half the size of our sun and 10% the size of our sun. That still leaves between 40–80 billion stars much like the sun. If one in five of those has an Earth-like planet, that means there may be between eight and sixteen billion Earth-like planets in the Milky Way. Of course these numbers may be off. The number of sun-like stars may be lower, or higher. The number of Earth-like planets may be more, or less. We just can’t know, so far. Further, there is no reason to assume that only stars like our sun will have planets capable of supporting life. Or that only a planet will support life. There may be intelligent life on a large moon of a gas giant exoplanet in the “Goldilocks zone” of a red dwarf. There is also no way to know how typical the Sol system is with it’s eight planets, half of which are ice or gas giants, and half of which are small rocky planets like Earth. Most of the exoplanets we know about are gas giants like Jupiter, just because they are easier to detect. Remember, we haven’t actually “seen” any exoplanets. We only know they are there by the way their gravity affects their home stars, causing a wobble, or they are aligned with Earth such that the transit of the planet between Earth and its star causes the star to flicker. Small, rocky planets like Earth are just harder to find. So there may be lots of them, or not. We just don’t know, yet.

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As a galaxy forms, a random Brook Pridemore Matt Walsh’s Home Adress Is 3429 Harborwood Circle Nashville Tn 37214 Shirt of matter in space coalesces into a disk, or some other elongated and curved form. This process can be thought of akin to a ballet dancer tucking in her arms and legs as she spins, resulting in her spinning much faster. In classical mechanics, ignoring all relativistic effects and nonlinear terms, this can be described simply as follows. Moment of inertia, the quantity relating to how hard a force has to try to rotate an object, increases as an the matter becomes more central due to its own gravitational attraction. This, by conservation of energy, the angular velocity must increase proportional to the square root of the decrease in moment of inertia. All in all, this phenomenon happens in many ways right in front of you every day, however galaxies boast a much more grandiose scale than we are akin to conceptualizing.

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