NASA/JPL-Caltech
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Illustration of the collision of two planets.
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Nationalgeographic.co.id—Astronomers find evidence crash between the two planet in the system solar system which is 95 light years from Earth. According to their analysis, unusual dust around star 23 million year old youth named HD 172555 is the result of crash planet–planet which is so loud that it at least strips part of the atmosphere of one planet the.
“This is the first time we have detected this phenomenon, from a deeply stripped protoplanetary atmosphere.” crash giant,” said Tajana Schneiderman, an astronomer at MIT.
Everyone is interested in observing crash giant because we predict the event to be commonplace, but we don’t have evidence in many systems for it. Now we have additional insight into this dynamic.” Science Alert.
Forming process planet is a complicated process. After a star Once formed, the disc of remaining material then swirls and churns. These materials then begin to clump together to form seeds planet.
These larger and larger blobs collide and coalesce, eventually gaining enough mass for the disparate nuclei to settle at the center, and eventually becoming a planet.
However, not every baby planet endure. For example, one planet the size of Mars that doesn’t enter Solar system collided with Earth to form the Moon.
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Astronomers think that most planets don’t form in their final places either. Instead, the planets formed elsewhere and migrated to their final positions. These movements will cause additional disturbance which can result in a collision.
Therefore, collisions of this kind are considered a fairly common occurrence during the formation of planetary systems. In fact, this collision process appears to have played an important role in the way planets grew and in the formation of the main architecture of the solar system.
The HD 172555 has long been considered a bit odd. The dust swirling around it has an unusual composition and grain size. The dust contains unusual amounts of solid silica and silicon monoxide, and much smaller-than-average dust grains.
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This dust had previously been interpreted as the result of a hypervelocity impact, so Schneiderman and his colleagues decided to take a closer look at the carbon monoxide surrounding the star.
“When people want to study the gas in a disk of dust, carbon monoxide is usually the brightest, and thus the easiest to find,” says Schneiderman. “So we’re looking at the carbon monoxide data for HD 172555 again because it’s an interesting system.”
They found that there was a considerable amount of carbon monoxide orbiting the star at an unusually close distance of as close as 10 astronomical units. At this distance, the gas should be dispersed by the stellar radiation, which means an explanation for this unusual phenomenon is needed.
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According to the research team’s modeling, it was the result of a giant collision or collision. They can even narrow down when and how it happened.
At least 200,000 years ago a rocky planet the size of Earth was hit by a smaller object at a speed of 10 kilometers per second. This is a fairly new time in astronomy that carbon monoxide hasn’t had time to decompose yet.
The collision would be so massive it would blow up at least part of the rocky planet’s atmosphere. This will explain the cause of the presence of silica-rich dust and carbon monoxide.
“Of all the scenarios, it’s the only one that can explain all the features of the data,” said Schneiderman, who has published a study report on this giant collision in the journal Nature on October 20, 2021.
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