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Solopos.com, WASHINGTON – A mysterious space phenomenon, the disappearance of the planet Fomalhaut b in 2014, is still being debated. This bright exoplanet in the sky just disappeared, confusing many astronomers.
Fomalhaut b, about 25 light-years from Earth, was first discovered by the Hubble Space Telescope in 2004 and 2006.
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The name Fomalhaut b was famous because it was an exoplanet (planet outside our solar system) that Hubble could see with the naked eye because it had bright light.
The name Fomalhaut b was famous because it was an exoplanet (planet outside our solar system) that Hubble could see with the naked eye because it had bright light.
But 10 years later, the bright light simply disappeared. Scientists also wonder: where did Fomalhaut b go?
Some suspect that it left the solar system where the star Fomalhaut is located and disappeared. Some scientists believe it was attracted to another solar system. While others suspect that it was destroyed in an interplanetary collision.
But a study was published in the journal on Monday (April 20, 2020). Proceedings of the National Academy of Sciences (PNAS) gave a completely different answer.
Mysterious planets solved
Fomalhaut b, the researchers wrote in the study, was not a planet to begin with. Instead, in 2004 and 2006, astronomers saw a huge cloud of icy dust formed from the collision of two pieces of debris in the Fomalhaut solar system.
The collision is believed to have occurred in the Belt region of the Fomalhaut Solar System, which contains space objects made of ice, similar to the Kuiper Belt in our Solar System.
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Scientists believe Hubble discovered the object, believed to be a planet, shortly after the collision. At this point, the cloud resulting from the explosion expanded and became concentrated in a narrow area. But by 2014, the cloud of the explosion had disappeared.
“Collisions like this are very rare and so it is extraordinary that we were able to see one of them,” said Andras Gaspar, an astronomer from the University of Arizona, US, who led the study, as reported by Live Science.
In the study, Gaspar evaluated Hubble’s observation archive from the last 20 years. He found that Fomalhaut b weakened over time before finally disappearing in 2014.
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Gaspar created a computer simulation to observe a collision between two icy space objects up to 200 kilometers in diameter. The results show that collisions between such large objects can create huge clouds, according to Hubble observations.
This hypothesis may also explain some of Fomalhaut b’s strange behaviors. For example, for an explanet at a distance of 25 light years from Earth, the light is very bright.
On the other hand, Fomalhaut b also has no infrared properties, suggesting that it is very cold. In fact, as a young planet that normally has a high temperature, it should emit infrared rays.
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The researchers said they would continue to study the Fomalhaut solar system to confirm that what Hubble saw in 2004 was not a planet but a giant cloud of ice.
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