Scientists from Queen's University Belfast have announced the discovery of a rare exoplanet, NGTS-38 b, which orbits a distant star every 180 days. The planet is about 8% larger than Jupiter and nearly five times more massive, placing it in the category of "super-Jupiters." This finding adds a notable specimen to the growing catalog of exoplanets beyond our solar system.
The planet's 180-day orbit is unusually long for a gas giant of its size, offering astronomers a unique laboratory for studying planetary formation and atmospheric dynamics. Such objects are key to understanding how massive planets evolve and migrate in their stellar systems. The discovery was made by an international team led by researchers at Queen's University Belfast.
NGTS-38 b was detected using the Next-Generation Transit Survey (NGTS), a ground-based array of telescopes designed to find exoplanets around bright stars. Its significant mass—almost five times that of Jupiter—suggests a dense core and a thick gaseous envelope. These characteristics make it an ideal target for follow-up atmospheric studies using instruments like the James Webb Space Telescope.
The finding underscores the rarity of super-Jupiters with prolonged orbital periods, which challenge existing models of planetary system architecture. Future observations may reveal whether the planet formed in its current orbit or migrated inward over time. For now, NGTS-38 b stands as a compelling case study for how the universe's largest planets come to be.
The team emphasized the need for additional spectroscopic data to confirm the planet's atmospheric composition. Without such data, assumptions about its formation remain speculative. The research underscores how each discovery narrows the gap in our understanding of exoplanetary diversity.