" We don't really know exactly how much they are pushing this comet around, " Chodas explained.

“我们真的不知道它们到底把这颗彗星推了多远。”

While comet ZTF began in our solar system, we cannot be sure it will stay there, Chodas said.

乔达斯说，虽然ZTF彗星起源于我们的太阳系，但我们无法确定它是否会留在那里。

" In the comet business, you just wait for the next one because there are dozens of these, " Chodas said.

“你只需等待下一颗彗星，因为有几十颗这样的彗星。”

However, they do not know how close it came to Earth or whether it was even visible to the Neanderthals, said Chodas.

然而，乔达斯说，他们不知道它离地球有多近，也不知道尼安德特人是否能看到它。

Chodas said that while several comets have appeared in the sky over the past year, " this one seems probably a little bit bigger and therefore a little bit brighter and it's coming a little bit closer to the Earth's orbit."

乔达斯说，虽然在过去一年里，天空中出现了几颗彗星，但“这颗彗星看起来可能更大一些，因此也更亮一点，它离地球轨道更近一些。”