What elements or compounds make up the majority of the atmospheres of the gas giants?.

Hydrogen and Helium make up the majority of the atmospheres of the gas giants.Gas giants are mostly composed of hydrogen and helium, the same elements that make up most of the sun. Astronomers believe that hydrogen and helium gases made up most of the solar system when it first formed.Gas giants are giant planets composed primarily of hydrogen and helium. Gas giants are also called failed stars because they contain the same basic elements as stars. Jupiter and Saturn are gas giants in the solar system. ThePlanet's core is thought to consist of rock and nickel-iron alloys surrounded by an outer layer of very hot liquid consisting of water, ammonia, and methane.Learn more about gas giants here:- https://brainly.com/question/7513051#SPJ4