How do physicists study the universe?

Answer 1

study the radiation from the universe in all wave lengths.

Men set foot on Earth and the Moon; space probes and rovers studied Mars, Venus, Jupiter, Saturn, and other planets; space-based telescopes studied galaxies and stars; comets and asteroid probes visited some asteroids and studied them.

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Answer 2

John Alexander

Physicists study the universe through observation, experimentation, and mathematical modeling. They use telescopes to observe celestial objects, particle accelerators to study fundamental particles, and detectors to measure cosmic rays. They also use theories such as general relativity and quantum mechanics to develop models of the universe's behavior.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.