In 2014, a 0.9 meter-wide meteor entered and burned up in Earth’s atmosphere over the South Pacific; while this alone may be interesting, this particular meteor was unique because its origin was from a different solar system.
At the time that this meteor was observed, it didn’t seem very interesting; it was small and simply burned up. However, a recent interstellar meteor led scientists to believe that there could’ve been more foreign objects traveling from distant solar systems. This recent visitor, a 400-meter wide meteor, traveled in a particular path that differentiated it from typical meteors. It’s entrance and departure were at a sharp angle.
When astronomer Avi Loeb began to search through NASA’s past archives of meteors, he noticed there was one that followed a similar trajectory and behaved in a similar fashion to the current interstellar meteor: the small meteor from 2014, which is currently believed to be the first interstellar object to enter our atmosphere. This speed and manner in which the meteor traveled suggested that it was not bound by the Sun’s gravity.
Loeb has predicted that there could’ve potentially been other meteors and object from distant locations and there could be more in the future.
This discovery is interesting because scientists don’t currently know the conditions of this meteor’s place of origin. It could come from another solar system similar to ours or could even have existed in a star’s “habitable zone” – the area around the sun where the temperature is just right to let water – and life – exist. Scientists could examine the composition of the meteor before it burns up in the atmosphere, however, to accomplish this, they must know when the next one will appear.
Loeb predicted that there could’ve been hundreds of millions of interstellar visitors over the Earth’s lifetime, and predicted one to appear once every 10 years. If scientists could predict where and when another meteor from another solar system will appear, they could observe what the other solar system is composed of and could possibly find signs of life.
To read about the source and read further:
https://www.sciencenews.org/article/2014-meteor-another-solar-system-oumuamua