There are tons of asteroids just floating out in space near Earth, and very few of them are particularly noteworthy. But a recent one that flew through our solar system was notable for one very important reason: It came from another star!
NASA has confirmed that an asteroid that flew through the solar system last month originated from another star system somewhere else in the Milky Way Galaxy. Now you're probably wondering why this would be a big deal. Aren't there tons of asteroids in our solar system? Surely some of them came from somewhere else!
Well, that would actually be incorrect. The asteroid that was discovered last month is the first time scientists have confirmed an object near Earth originated from outside of our solar system. NASA believes the asteroid most likely was traveling through space for millions of years before finding its way into our solar system.
The asteroid flew about 124 million miles from Earth. To put that in perspective, the Moon is about 239,000 miles from our planet, so it wasn't very close.
NASA says the discovery of this asteroid is allowing scientists to collect data on how other solar systems are formed.
Now, NASA also admits that this asteroid isn't particularly unique and they estimate that objects fly into the solar system about once per year, but are either too small or too far away for scientists to discover them.
NASA didn't mention anything about this being a possible precursor to an alien invasion, but it's probably best to assume it is.