Astronomy: space conquest and the latest news from the stars

[Ahmed]

Wait & see ...

[Macro]

Euclid....

No doubt the results of the discoveries will still divide...

[Ahmed]

You mean the existing divisions will apply to his results? Probably...

[izentrop]

or not

[Christophe]

dark energy...

I would have made a pun on the current riots in France ... but I will refrain ...

[izentrop]

Detected on July 15, two days after its closest passage to Earth, the "2023 NT1" object has since resumed its journey towards new cosmic horizons.
According to estimates, the piece of extraterrestrial rock, with a diameter of about 60 m, passed at a distance equivalent to a quarter of that which separates the Earth from the Moon.

[Christophe]

[Christophe]

The asteroid Oumuamua would be an alien vessel according to Harvard

New hypotheses: https://trustmyscience.com/nature-objet ... eterminee/

An object composed largely of nitrogen ice

Desch and Jackson found one particular ice - solid nitrogen - that exactly matched all of the object's characteristics simultaneously. And since solid nitrogen ice can be seen on Pluto's surface, it's possible that a comet-like object could be made of the same material.

“We knew we had found the right hypothesis when we finished calculating the albedo (the body's degree of reflection) that would match Oumuamua's motion to the observations. This value appeared to be the same as that which we observe on the surface of Pluto or Triton, bodies covered with nitrogenous ice, ”says Jackson.

They then calculated how quickly chunks of solid nitrogen ice would have been detached from the surfaces of Pluto and similar bodies early in our solar system's history. And they calculated the likelihood of chunks of solid nitrogen ice from other solar systems reaching ours.

“It was probably detached by an impact about half a billion years ago and thrown out of its parent system. Being composed of frozen nitrogen also explains the unusual shape of 'Oumuamua. As the outer layers of nitrogenous ice evaporated, the body's shape would have gradually flattened, much like a bar of soap does when the outer layers are removed through use, ”says Jackson.

Extraterrestrial hypothesis: the danger of hasty conclusions
Although Oumuamua's pseudo-cometary type was quickly recognized, the inability to immediately explain it in detail led to speculation that it was a piece of alien technology, as in the recently published book Extraterrestrial: The First Signs of Intelligent Life Beyond Earth by Avi Loeb of Harvard University. This sparked a public debate on the scientific method and the responsibility of scientists not to jump to unwarranted conclusions.

“Everyone is interested in aliens, and it was inevitable that this first object outside the Solar System would make you think of aliens. But it is important in science not to jump to conclusions. It took two or three years to find a natural explanation - a piece of nitrogenous ice - that matches everything we know about 'Oumuamua. It's not that long in science, and far too early to say we've exhausted all natural explanations, ”Desch says.

While there is no evidence that this is extraterrestrial technology, as a fragment of a Pluto-like planet, 'Oumuamua provided scientists with a special opportunity to examine extrasolar systems in 'a unique way. As more and more objects like 'Oumuamua are found and studied, astrophysicists may continue to expand our understanding of what other planetary systems look like and how they are similar or different from our own. own solar system.

"This research is exciting in that we have probably solved the mystery of what 'Oumuamua is, and we can reasonably identify it as a piece of an exo-Pluto, a Pluto-like planet in another solar system. . Until now, we had no way of knowing if other solar systems had Pluto-like planets, but now we have clues, ”Desch says.

There is a recurrence:
https://www.science-et-vie.com/ciel-et- ... 10377.html

[izentrop]

The latest news from the universe in a Hugo Lisoir channel https://www.youtube.com/@hugolisoiryoutube
The last video...

[izentrop]

We know a little more about the limits of the universe with James Web...