- Year Discovered: 2009
- Location: 90 Parsecs From Our Sun
In 2009, the Milky Way had been experiencing odd ripples that sort of stumped astronomers. Something was disrupting the galaxy, but what was it? By 2015, they finally had their answer. This was all being caused by a dwarf galaxy, now affectionately referred to simply as “Galaxy X.” The galaxy had been orbiting the Milky Way, which caused it to alter the motion of our galaxy using its own gravitational pull. Of course, it was not a large enough force to do too much to us.
It was relatively dark, but 4 bright stars within Galaxy X allowed us to see it. NASA scientists speculated that dark matter is the reason why Galaxy X went unseen for so long. Dwarf galaxies were relatively unique in 2015, but right after this, we began seeing more of them. In 2016, NASA discovered Dragonfly 44, made up of 99.99% dark matter. More of these galaxies have been seen since. In our book, Galaxy X and others are among the freakiest things NASA discovered.