Cientistas used the TESS satellite, from the North American space agency Nasa, to identify a planetary system with unprecedented characteristics for modern astronomy. Localizado approximately 370 light-years from Terra, the cluster around the star TOI-201 features planets with orbits that change visibly in real time. The phenomenon contrasts with the stability of our own solar system, where orbital changes take millions of years to occur. The discovery was detailed in a study published in the magazine Science and had the support of observatories installed on Antártida.
The central star, named TOI-201, has dimensions and mass around 30% greater than that of Sol. Around it, three completely different worlds orbit, which breaks the common “peas in a pod” pattern observed in other systems. The data was collected by the TESS mission and the ASTEP project, which operates on Planalto Antártico under privileged observation conditions. The researchers noted that the gravitational interactions between the planets are so intense that the configuration of the system is constantly changing.
Diversidade of worlds around the star TOI-201
The system is made up of celestial bodies with very different physical profiles and trajectories, which intrigues the international scientific community. The closest planet to the star is a rocky super-Earth, which has six times the mass of our planet and completes one revolution around the star in just 5.8 Earth days. Mais far away is a gas giant half the mass of Júpiter, with a year that lasts 53 days. Finally, there is a third massive object, with 16 times the mass of Júpiter, taking almost eight years to complete its orbit.
- Superterra rocky with six times the mass of Terra.
- Gigante intermediate gas with half the mass of Júpiter.
- Planeta massive external with 16 times the weight of Júpiter.
- Estrela host 1.3 times larger than Sol in mass and diameter.
- Distância estimated to be 370 light years from the solar system.
Essa morphological variety indicates that the planets do not share the same orbital plane, unlike what happens with Terra’s neighbors. The presence of an outer planet with an extremely flat and inclined orbit exerts a disproportionate gravitational force on the inner worlds. Esse space tug of war results in a fast-paced and unpredictable cosmic dance.
Órbitas switch at a rapid pace to spatial patterns
Astronomers’ main discovery is how quickly the orientation of orbits changes. In conventional systems, the inclination and shape of planetary paths are stable for billions of years. In TOI-201, the tilt is so steep that the planets constantly change their position relative to the face of the star. Segundo the international team’s calculations, in about 200 years, the planets will no longer be aligned to be seen from Terra via the transit method.
Continuous monitoring made it possible to observe these structural variations almost instantly. The phenomenon offers a rare opportunity to understand how planetary systems behave shortly after their formation. It is as if scientists are witnessing the gravitational “fine-tuning” process that defines the final destiny of each world. The current instability suggests that the system is still in a phase of active and violent reorganization.
Tecnologia on Antártida assists Nasa’s mission in space
Validation of the data obtained by the TESS satellite depended fundamentally on ground-based telescopes located in one of the most isolated places in the world. The ASTEP project uses the Concordia base, on the Antártida, to observe the sky during the long polar nights. The altitude of more than three thousand meters above an ice sheet reduces atmospheric interference, allowing a precision that other observatories cannot achieve. Essa collaboration between space and terrestrial technology was what made the measurement of orbital changes possible.
Astrônomos of Universidade of Birmingham, in Reino Unido, highlighted that the gravitational interaction in this system is a living laboratory. Analysis of TOI-201’s behavior helps explain why some solar systems end up with stable, circular orbits, while others remain chaotic. The study also reinforces the efficiency of the TESS satellite in searching for worlds that defy the laws of planetary physics traditionally known until now.
Novas observation rounds are scheduled over the next few months to refine the mass of the planets involved. The team hopes to identify whether there are other smaller bodies hidden by the strong influence of the gas giants. The system will continue to be monitored as long as the alignment allows the planets to pass in front of the star. Cada data collected now is critical as the observation window is closing rapidly in astronomical terms.
