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Does every planet in the universe have an atmosphere?

Answer 1

No. Mercury in our solar system is an example..It do not have nay atmosphere.

Planets may have an atmosphere when they first form, but as solar winds and gravity increase, planets may lose it. Mars, for example, has a very thin atmosphere that is only 7 million bars.

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Answer 2

Ian Ashland

No, not every planet in the universe has an atmosphere. An atmosphere is primarily composed of gases surrounding a celestial body held in place by gravity. While many planets in our solar system have atmospheres, such as Earth, Mars, Venus, Jupiter, and Saturn, some planets, like Mercury and the Moon, have very thin or virtually nonexistent atmospheres. Additionally, gas giants like Jupiter and Saturn have much thicker atmospheres compared to terrestrial planets like Earth. Beyond our solar system, exoplanets vary widely in their atmospheric compositions, with some having atmospheres and others not.

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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.