what is an universe?
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the universe is everything that we can touch, feel ,sense,measure or detect.it includes living things, planets,star,galaxies, dust cloud ,etc.the universe contain billions of galaxies each containing millions or billions of stars.
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Answer:
The universe is all of space and time and their contents , including planets. , stars, galaxies and all other forms of matter and energy.
Explanation:
MASS (original matter) = at least 10 square 53 kg
MAIN CONTENTS = ordinary (baryonic) matter (4.9%) ; dark matter (26.8%) ; dark energy (68.3%)
AGE (within lambda CDM model) = 13.799 ± 0.021 billion years
DIAMETER = unknown. diameter of the observable universe : 8.8 × 10 square 26 m (28.5 gpc or 93 gly)
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