Universe

Universe

Technically, the Universe is all of spacetime and everything that exists therein, including all planets, stars, galaxies, the contents of intergalactic space, the smallest ubatomic particles, and all matter and energy. The observable universe is about 46 billion light years in radius.

The Big Bang theory is the prevailing cosmological model that describes the early development of the Universe, which is calculated to have begun 13.798 ± 0.037 billion years ago. Observations of supernovae have shown that the Universe is expanding at an accelerating rate.

The Sun
Mercury, Venus, Earth, Mars - 4 terrestrial planets, Jupiter and Saturn (2 gas giant planets),
Uranus and Neptune (2 ice giants)
Pluto
Dwarf Planets
Small Bodies like comets
Other Solar Systems

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