In a recent breakthrough, astronomers have discovered a rare giant exoplanet that bears a greater resemblance to Earth.
The planet, known as TOI-199b, has temperatures closer to Earth.
The temperate planet is located at a distance of more than 330 light years. With an estimated temperature of about 175°F, it sits in the middle between the scorching “hot Jupiters” and the icy gas giants of our own solar system.
The study, led by scientists from Penn State and NASA’s Jet Propulsion Laboratory (JPL) at the California Institute of Technology, was published in the Astronomical Journal.
“Since the first exoplanet was discovered in 1992 by a team that included Aleksander Wolszczan of Penn State, astronomers have found thousands of exoplanets. But only a few giant, moderate exoplanets are known, and this is the first time we have been able to study the atmosphere of one of them in detail,” said Renyu Hu, associate professor of astronomy and astrophysics at Penn State Eberly College of Science and leader of the research team.
The study also confirmed the presence of methane in the planet’s atmosphere, confirming existing theoretical models for temperate gas giants.
The analysis also showed evidence of ammonia and carbon dioxide. Future observations are needed to determine the relative abundance of these gases.
“With additional observations of this planet, we could determine the relative abundance of these different gases in the atmosphere,” Hu confirmed.
The success of this study provides a framework for future research, allowing researchers to determine whether TOI-199b has unique features or if these features are common among other temperate giants.
