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721.
Which term describes the idea that the universe is expanding and that galaxies are moving away from each other?
Explanation:
722.
What is the name of the proposed force or energy responsible for the observed accelerated expansion of the universe?
Explanation:
723.
What is the term for the hypothetical point in the universe where gravitational forces cause matter to collapse to an infinitely dense state?
Explanation:
724.
Which type of galaxies have a flattened, disk-like shape and contain both old and young stars?
Explanation:
725.
What is the term for the process by which light from a distant object is stretched and shifted toward the red end of the spectrum due to the expansion of the universe?
Explanation:
726.
What is the estimated age of the universe according to the most widely accepted cosmological model?
Explanation:
727.
What is the term for the process by which heavy elements are formed through nuclear reactions in stars?
Explanation:
728.
What is the largest planet in the solar system?
729.
What is the name of the spacecraft that successfully landed on Mars in 2021 and sent back images and data?
Explanation:
730.
Which planet is known for its beautiful ring system?