In October 2017, world astronomers realized that they had seen something completely unbelievable: an object that was obviously a visitor to another solar system.
And now some Harvard scientists say that the subject that has interwoven with the solar system at an unprecedented rate may not be a coincidence.
Before we examine the scientists' claims, we should summarize what we know: this "something" was 230 meters long, 35 meters wide and roughly shaped like a cigar. The color was dark red in color. And she turned around her longitudinal axis.
"Oumuamua" got the visitor hot. It's a Hawaiian language for "Spaniard from afar".
Initially, the object was classified as a comet, then as an asteroid. But it did not matter. Especially with regard to his journey.
In particular, comets often have very eccentric paths that are far out on the back yard of the solar system before they return and start to "descend" towards the sun.
Sometimes the passage around the sun gives them another "kick" (the same principle as a snake), so to the extent that they are thrown out of the solar system for good.
A remote visitor
However, Oumuamu proved to be much exotic. Her path was hyperbolic, that is, our solar system was not even expired. He came from outside. And, on the narrow curve around the Sun, she disappeared back into the darkness.
Therefore, it is considered an interstellar object.
And Oumuamu did not break my mind to look at it closer if we said it. Solar extraction caused it to accelerate: when Oumuamu rounded the sun, it had a speed of almost 316,000 kilometers per hour.
Oumuamuas watched as he passed the solar system.
Oumuamuas travel through the solar system.
And now it's on the way out of the solar system, with a weak north rise in relation to the ecliptic of the solar system or the "equator".
But even though it is still about 30 km per second – like a bat, as Meat Loaf says – it will take nearly 20,000 years for Oumuamu to be completely out of our solar system.
But in January 2019, Saturn's orbit passes, and in 2022 it leaves Neptune, the farthest planet of the solar system, behind it.
The lion is lying?
And as has been said, there are now those who believe that Oumuamu can hide the secret under his rocky, rusty exterior. Nothing new under the sun, this kind of refreshment flourishes in the spicy undergrowth of the Web since we realized the existence of Oumuamu.
It was even those who wanted the stone to be called Rama because it has some external similarity to the interstellar extraterrestrial spacecraft Arthur C Clarkeus, which goes through the solar system similar to Oumuamu in the Book of Rama.
However, there are two serious academic experts from Harvard University in the United States, professor Abraham Loeb and scientist Shmuel Bialy who seriously suggest that Oumuamu may be a cosmic bomb emanating from a foreign civilization.
Explanation: People are spying on us. (The hypothesis that was de facto tested by listening to her if she handed some radio communication to a third party, and she turned out to be perfectly calm.)
Fast acceleration was expected
Especially the acceleration of Oumuamuas, when rounding the sun, causes scientists to suspect that something is wrong in this process. They think that such an acceleration might be because the craft, excuse me, the asteroid is de facto hollow and much simpler than it looks.
Assuming Oumuamu is an empty cylinder and is very light in relation to its volume, speed can be achieved by the effect of sunlight, that is, the radiation pressure from the particles in the sunlight causes pressure.
The fact that it is possible to navigate with the help of the solar wind is not a message, Johannes Kepler described this phenomenon in the letter of Galilei 1610.
The IKAROS project.
There are currently theoretical plans to use the space needs phenomenon, such as the Starshot breakthrough initiative, and even practical experiments such as the IKAROS project.
Everyone is not convinced
But Oumuamu would be an interstellar yacht with sunlight, the research director of Pekka Janhunen at the Meteorological Institute is hard to believe. Janhunen, who pronounced Yle, has developed an electrical variant of the sun seal.
Janhunen considers Loeb Bialy's hypothesis as "somewhat wild"
Loeb and Bialy draw attention to the fact that Oumuamu is never surrounded by the usual veil of gas, which usually happens when asteroids pass near the sun, and the strong heat causes the matter inside the celestial body to gasify.
Janhunen sees that it is likely that Oumuamua spent so long in interstellar space that he was "strengthened," so he no longer supplies any gas.
Previously, Oumuamu was supposed to be an ancient comet whose ice was burned during a previous passage around another sun.
"Extraordinary Claims, etc."
Another scientist who is skeptical about the conclusions of Harvard colleagues is Alan Jackson, a scientist at the University of Toronto, Scarborough, who believes that the Loeb and Bialy studies are "really inadequate".
Jackson also recalls the words of Carl Sagan: "Extraordinary claims require extraordinary evidence."
"And this study suffers from a considerable lack of evidence, not to mention extraordinary evidence.
Jackson, who published a study suggesting that Oumuamua originated from the binary system, ie the System of Two Solar Systems, also points out that all spectral analyzes of light from Oumuamu indicate that it is an asteroid.
Loeb and Bialy realize this, but they suggest that someone could cover Oumuamu with "interstellar dust" to cover up his true light signature.
How do they say in Hollywood movies? "If you say so …"