- Gas giants are large planets composed mostly of hydrogen and helium, like Jupiter and Saturn.

- They lack hard surfaces, with swirling gases above a solid core.

- Hot Jupiters are gas giants orbiting very close to their stars, with high temperatures.

- Early exoplanet discoveries, including hot Jupiters, were made using the radial velocity method.

- The exoplanet HIP 67522 b, discovered in 2020, is one of the youngest hot Jupiters found, providing insight into planetary formation.