Astronomers Find Giant Planets That Light The Sun's Twins
JAKARTA Recent studies provide strong evidence that a giant planet is orbiting a star in the Alpha Centauri system, the star system closest to the Sun.
This evidence was discovered by a number of astronomers using the James Webb Space Telescope. In a study published in the Astrophysical Journal Letters, they believe that there is a gas giant planet orbiting Alpha Centauri A.
Alpha Centauri consists of two binary systems, namely Alpha Centauri A and Alpha Centauri B which are both similar to the Sun, and a faint red dwarf named Proxima Centauri. This three star system is about 4 light years from Earth.
This is one of the most powerful discoveries regarding the presence of planets around Alpha Centauri A. So far, the existence of planets around Alpha Centauri A and B is difficult to confirm.
Observations of this planet are very important because of its location adjacent to Earth and orbiting the habitable zone of a star like the Sun. However, scientists believe that the planet is unfit for habitation because it is filled with gas.
Although believed to be unfit to live in, the planet is important to study according to NASA. Charles Beichman, one of the workers on the Jet Propulsion Laboratory (JPL), said that all exoplanets could increase their insight into the planetary system.
"Every exoplanet found will provide the best chance for us to collect data on planetary systems other than our system. However, this observation is very challenging ... because these stars are very bright, close, and move across the sky quickly," Beichman said.
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Observations of the Giant Planet in Alpha Centauri A
The first observations were made in August 2024 using a coronagraphic mask on the Medium Infrared Instrument (MIRI) to block the star's light. The observation team managed to find an object 10,000 times fainter than Alpha Centauri A.
This object is separated from stars about twice the distance between the Sun and Earth. For now, researchers need more data to ensure that the objects they see are planets.
However, the results of the latest analysis combined with computer modeling conclude that the object is a giant gas planet. Observers believe that the findings are not background objects such as galaxies or image artifacts.