Space Cracks

There are 2 types of space cracks, green and blue ones:

Blue space crack
A blue space crack is a connection to a new found galaxy, but the coordinates (X, Y, Z) and distance are still not known. To get them you have to survey abnormal signals, meteorites, ... and with luck get hints or even a coordinate itself. Hints will show up as "Y>200", "Y<203", ... if found as "Y=201". The first person who finds a correct coordinate gets a bonus (~50,000 ETH). The moment someone found all 4 numbers, one can enter them at the space crack and travel to the new found system. It will be exclusive to the ones who have the coordinates for the next 46 hours.

As finding coordinates is based on luck, the Explorer profession is very helpful (left tree).

Green space crack
There is some kind of PvE event, needs more information.