A common question about both Saturn and Jupiter is whether they are failed stars, or a failed Sun. This is because they're largely made up of the same properties as stars, hydrogen and helium. The issue with both of these planets is that they don't have enough mass to actually create the temperature required to shine like a star does. So, some people refer to Saturn as a failed star, but it doesn't have anywhere near the mass to be considered anything near a star, to be honest.