Galactic Astronomy

A galaxy is a massive, gravitationally bound system which consists of stars, stellar remnants, interstellar medium of gas and dust, and dark matter. Galactic astronomy is to study of our own Milky Way Galaxy, and Extragalactic astronomy is to explore bjects outside our own Milky Way Galaxy. Our own Milky Way galaxy, where our Solar System belongs to, is the best studied galaxy in many ways.

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