The Universe

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What is the Big Bang Theory?

Back

The Big Bang Theory posits that all of what would become the universe was concentrated in a single small point, or singularity, which rapidly expanded into what is now stars, planets, galaxies, matter, and energy.

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What is Cosmic Background Radiation (CMB)?

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Cosmic Background Radiation (CMB) is the remaining energy from the Big Bang, filling the universe and providing evidence for the Big Bang Theory.

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What is nucleosynthesis?

Back

Nucleosynthesis is the process of combining smaller elements into larger elements, which occurs in stars during their lifecycle.

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Which galaxy do we live in?

Back

We live in the Milky Way Galaxy.

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How old do scientists estimate the Universe to be?

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Scientists estimate the Universe to be approximately 13.8 billion years old.

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What is a singularity in the context of the Big Bang?

Back

A singularity refers to a point in space-time where density and gravity become infinite, representing the state of the universe before the Big Bang.

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What is the significance of the Cosmic Microwave Background Radiation?

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The Cosmic Microwave Background Radiation is significant as it provides a snapshot of the early universe and supports the Big Bang Theory.

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What is the difference between a galaxy and a star cluster?

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A galaxy is a massive system of stars, stellar remnants, interstellar gas, dust, and dark matter, while a star cluster is a group of stars that are physically close to each other in space.

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What is the process of star formation?

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Star formation occurs when gas and dust in space collapse under gravity, leading to the creation of a protostar, which eventually ignites nuclear fusion.

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What is dark matter?

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Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects on visible matter.