The New Horizons spacecraft is due to fly past Ultima Thule, an icy Kuiper Belt Object, at around 5:30 am on January 1st. It’ll scream past at ridiculous speed, and send back the most distant photographs ever taken of anything anywhere.
It’s so far away, that even though those transmissions travel at the speed of light, it’ll take 6 hours before they reach Earth.
I think this sounds like a good start to 2019!