2I/Borisov

We even saw it when it was leaving.

Then we have Borisov.

Uh, this one we are a bit more ready, I will say.

Then we have this one, 3I Atlas.

We- we've only had three of these that we've found so far.

There was one, ‘Oumuamua, two, Borisov, and then most recently, three, Atlas.

Mm-hmm.

We haven't seen a lot of them, but with the new Vera Rubin telescope and the survey it's gonna be taking, we might be seeing a lot more of these.

That is, it was moving so fast that it was clearly going to achieve escape velocity from the Sun, and tracking its trajectory back, we're confident it must have come from outside the solar system initially.

Since ʻOumuamua, we've also identified an interstellar comet called Borisov, which was also observed just passing through in twenty nineteen.

We've also had an alleged interstellar meteor known as the Manus Island fireball, which crashed to Earth in twenty fourteen.

Subsequent analysis suggesting a high likelihood that it had also been moving too fast to have been in a bound orbit around the Sun.

3I/ATLAS is the third interstellar object ever discovered.

It follows 1I/Oumuamua back in 2017 and 2I/Borisov in 2019.

It was found as it was approaching the sun, spending enough time in our solar system for astronomers to study it in some detail.

While it was difficult to measure the composition of the first two interstellar objects, with no gas detected from Oumuamua and Borisov being too faint, this was not the case for 3I/ATLAS.

Thanks to the object's unprecedented brightness, the authors were able to measure the comet's isotopic ratios, the relative amounts of different forms of the same element.

They measured the ratios of carbon and nitrogen isotopes in cyanide molecules present in the gas around the comet.

We're really excited about this object.

So far, we've discovered three interstellar objects.

So that's why we're finding it hard to spot them, 'cause they're small, and they're fast-moving.

We found one called 'Oumuamua in 2017, and then Borisov in 2019, and then just last year we had one called Atlas that came shooting through the solar system.

Who's doing the 8:30?

Well, I have to find it first b- because I don't know that.