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1st known interstellar visitor is likely cookie-shaped planet shard, study says

The first known interstellar visitors to our solar system are neither the first suspected comets nor asteroids, nor do they look like cigars. According to new research, the mysterious object is the wreckage of the Pluto-like world, shaped like a cookie.

This week, astronomers at Arizona State University reported a strange 148-foot (45-meter) object that appeared to be made of frozen nitrogen, like the surface of Pluto and Neptune’s largest moon, Triton.

Research authors Alan Jackson and Stephen Desh knocked out a mass from an ice-nitrogen-covered planet 500 million years ago, causing that part to fall from its own star system on our planet. I think I sent it to. The reddish debris is a fragment of the original self, the outer layer of which is believed to have been evaporated by cosmic rays and, more recently, the Sun.

It was named Oumuamua in Hawaiian as a scout after the Hawaiian Observatory, which was discovered in 2017.

Appears only as a pinpoint of light millions of miles away with the closest approach, but occurs beyond the solar system as its velocity and path suggest that it is not orbiting the Sun or anything else. It was judged that it was done.

The only other celestial body that has been confirmed to have wandered into our system from another star system is Comet 21 / Borisov, which was discovered in 2019.

But what is’Oumuamua? It didn’t fit into a known category — it looked like an asteroid, but advanced like a comet. However, unlike the comet, the tail was not visible. Speculation has come and gone between comets and asteroids — and even suggested that it may be an alien relic.

“Everyone is interested in aliens, and it was inevitable that this first object outside the solar system would make people think of aliens,” Desh said in a statement. “But in science it’s important not to jump to conclusions.”

Oumuamua could be a lump of nitrogen ice that is gradually eroding, as Jackson and Desh were propelled by using their luster, size, shape, and by letting out substances that do not produce a visible tail. We have devised a computer model that will help you determine that it is expensive. Soap sticks become thinner with use.

Their two treatises, published by the American Geophysical Union on Tuesday and usually held in Houston, were also presented this year at the Virtual Lunar and Planetary Science Conference.

Not all scientists buy new explanations. Harvard University’s Avi Loeb disagrees with the findings and supports his assumption that objects appear to be more artificial than nature. In other words, something from an alien civilization, perhaps a light sail. His newly published book, Extraterrestrial: The First Signs of Intelligent Life Beyond the Earth, deals with this subject.

Oumuamua, unlike comets and asteroids, is something we’ve never seen before, so as many scientists claim, “I can’t imagine a normal business,” Loeb emailed Wednesday. writing. “If you think of something you’ve never seen before, you need to leave the hypothesis of artificial origin in the table and collect more evidence about objects of the same class. “

When Oumuamua was closest to Earth, it appeared to be six times as wide as its thickness. These are the rough proportions of a single wafer of Oreo cookies, Desh said.

Beyond the orbit of Uranus, more than 2 billion miles (3.2 billion kilometers) away, even the Hubble Space Telescope is too small to see. As a result, astronomers need to rely on the original observations, and hopefully continue to refine their analysis, Jackson said.

According to Desch, by the time objects begin to leave the solar system around 2040, the width-to-thickness ratio will drop to 10: 1.

“Oumuamua may have matched the cookie when we saw it, but soon it will literally flatten like a pancake,” Desh said in an email.

That’s how the cosmic cookie-this anyway-breaks down.

1st known interstellar visitor is likely cookie-shaped planet shard, study says Source link 1st known interstellar visitor is likely cookie-shaped planet shard, study says

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