The first interstellar object ever detected in our solar system and have a very different movement from all other objects in our Solar system is the Oumuamua.
What is Oumuamua?
Oumuamua means the first messenger from a distant place. It was discovered on 19 October 2017 by using the Pan-STARRS1 telescope at Haleakalā Observatory, at Hawaii. It was detected because of it's different trajectory, it's different shape and it's different behavior from the entire solar system. You can see the image below that tells us a lot of things like it's shape, it's speed, it's density and the matter which it is made up of.
 |
| Image of Oumuamua |
Oumuamua shape
The change in its brightness while moving through irregular periods tells us it's shape, because when it moves, it rolls and the light that reflects on it changes, that means it is in a Cigar shaped. The length Oumuamua is about 400 meters.
Oumuamua speed
You can imagine just by that the Oumuamua speed is very high that it can easily escape from the Sun's gravity. It is suggest that this speed is gained if Oumuamua came from the near galaxy. On
9 September 2017 it is very close to Sun, on 14 August it very close to Earth and on 1 November it was left from the Mars orbit.
Oumuamua made up of
It suggests that the surface of Oumuamua is made up of about 1 meter rocks or any other element because when it enters our solar system its surface didn't vaporized. Also it is not a comet because it doesn't have any tail that means it's a asteroid. The color of Oumuamua is brown that means it endures the Cosmic radiations for about billions of years.
 |
| Image of Oumuamua |
Hypothesis about Oumuamua
1st Hypothesis
The first hypothesis is that the Oumuamua is came from the Kupir belt or Ooth cloud, but the objects that came from here cannot get the speed to exit from these belts, they only revolves around it that's why it is some kind of failed.
2nd Hypothesis
2nd Hypothesis tells us that Oumuamua is came from another Galaxy named Tyc4742-102701 about 1.3 million years ago that's why this Galaxy also kicks it to gain this super speed that predicted about 100km/hr, that's enough to exit from the Galaxy. Also, it is suggest that the Oumuamua is entered in this Galaxy from a another Galaxy.
3rd Hypothesis
3rd hypothesis says that Oumuamua is not came from a Galaxy but it was came from Interstellar space because Interstellar space contains millions of Asteroids. Interstellar space is the gap between two Galaxies where there is no stars and planets, also at the time of Galaxy formation some small pieces of rocks are through into the interstellar space. That's why most of the researchers are agree with the 3rd Hypothesis.
 |
| Image of Oumuamua from Pan-STARRS1 telescope |
Conclusion
Is this the first ever interstellar object that came in our solar system?
The answer is "No" because there are many objects that entered in our solar system before the Oumuamua but we cannot detect them because we have not much technology for them but not for Oumuamua because it travels very near to Earth.
These Asteroids are helps us to study about them, and helps us to study about a lot about of the Galaxies and the Interstellar space, and also helps us to study Oumuamua like different shapes objects.
0 Comments