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According to the SCP Foundation [1], there's a complex alien superstructure (known as a Malfunctioning Destroyer) located beneath Jupiter's Great Red Spot [2] capable of causing an end-of-the-world event.
It has been designated with the Special Containment Procedure number 2399, although it's really just knowledge of this object that has been suppressed. For due to SCP-2399's location and very nature, it can neither be physically contained nor destroyed at this point in time, as we simply do not have the technological means to do so.
Where it originated and how it travelled to our solar system are unknown. However, electromagnetic-based commands seem to be being sent to SCP-2399 from the Triangulum Galaxy, approximately three million lights years away.
Fortunately, SCP-2399 seems to be severly damaged, so currently presents no direct threat to life on Earth.
Unfortunately, SCP-2399 also seems to possess an unlimited power supply and be programmed to self-repair using a series of drones to complete the necessary work. And so, in a few decades time, we might be in trouble.
For now, however, we can relax and endeavour to have a happy new year (and worry more about how to pay the energy bill than some made-up machine of extraterrestrial origin stranded on Jupiter).
Notes
[1] The SCP Foundation is a fictional secret organisation featured in texts created by contributors on a wiki-based collaborative writing project known as SCP Wiki: click here. It is primarily concerned with mysterious phenomena known as anomalies and its mission is to secure and contain these anomalies so as to protect humanity from them.
[2] Located in Jupiter's lower atmosphere, the Great Red Spot is a persistent high-pressure region responsible for the largest anticyclonic storm in the solar system. According to those who belong to the SCP Universe, SCP-2399 uses highly advanced anti-matter technology to create this 10,000 mile-wide spacial voretx.