Could a habitable planet with lower gravity have a thick atmosphere?

I'm designing a habitable earth-like planet that has oceans, forests and life. Now this planet is a bit larger in diameter than earth but its mass and therefore its gravity is a bit lower. This lower gravity has resulted into large lifeforms. Now, one of this lifeforms resembles in appearance a large jellyfish with wings that glides through the air. However, I wasn't sure if a lower gravity is enough to allow such a huge creature to fly though the air, so I figured out a way to solve this by making the atmosphere thicker. But then it hit, " if a planet has lower gravity, how can it have such a thick atmosphere?" I was looking if there were real life planets that have these traits (lower gravity, thick atmosphere) and realized than Venus is a good match. But then again, Venus isn't really the most hospitable planet there is? So, to sum it up, could a planet have lower gravity and yet a thicker atmosphere? And also could such a planet be Earth-like?

posted about 6 years ago

John Michailidis‭

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