A gas giant is a type of planet that is primarily composed of gases such as hydrogen and helium. They are much larger than terrestrial planets and do not have a solid surface.
The atmosphere of a gas giant is typically very thick and extends far out into space. It is composed of mostly hydrogen and helium, with smaller amounts of other gases such as methane and ammonia.
Gas giants are often called "failed stars" because they have a similar composition to stars, but lack the necessary mass to sustain nuclear fusion and become a full-fledged star.
Yes, gas giants have extremely active weather systems due to their strong gravitational pull and fast rotation. Some gas giants, such as Jupiter, have prominent storms and hurricanes that can last for centuries.
It is highly unlikely for life to exist on a gas giant due to its extreme atmospheric conditions. The lack of a solid surface and the presence of toxic gases make it inhospitable for life as we know it.