The Solar System is located inside the "Local Bubble", which is a cavity in the interstellar medium (ISM) in the Orion Arm of the Milky Way. It contains, among others, the Local Interstellar Cloud and the G-cloud.

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The Solar System is the gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly.

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The Oort cloud is a cloud of predominantly icy planetesimals believed to surround the Sun to as far as somewhere between 50,000 and 200,000 Astronomical Units (0.8 and 3.2 Light Years).

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Cosmic dust is dust which exists in outer space. Most cosmic dust particles are between a few molecules to 0.1 µm in size. A smaller fraction of all dust in space consists of larger refractory minerals that condensed as matter left the stars.

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