Our Solar System Has a New Interstellar Visitor -- Here's Hoping it's a Comet

We get hit with stuff from space constantly. More than you might think. Somewhere around 20,000 meteors larger than a softball hit Earth every year. A few hundred are big enough to recover and catalog. Why aren't they more of a big deal? So far, every single one has been from our own solar system, mostly from an asteroid belt between Mars and Jupiter, some from the Moon or Mars after they're hit by other meteors. So, there's not much new to be learned by these objects. We're just glad they aren't the size of buses, and they mostly disappear into our oceans. It's extremely rare anything enters our solar system from outside its boundaries. Astronomers call these objects 'interstellar'. They know immediately when an object has arrived from interstellar space: its trajectory and velocity can't be explained by gravitational interactions within our solar system. Meaning, it's not orbiting the sun or any other object. It's literally passing through....