It started a long, long time ago and ended earlier this year (2019).
Our whole Universe was in a hot dense state!
When you've cracked that, all you need is to find some numbers.
A= How many letters are there in the first "U"?
B= The number of letters in the surname of character that became an astronaut
C= Use the force .. find a number for "Skywalker"
D= If you know the game RPS then I want the third letter of the next word in a particular variant (A=1, Z=26)
E= Find a number for "Jerusalem"
F= And finally, find a number for "Stockholm"
The cache is located at N51 27.XXX, W001 15.YYY
XXX is F-D-(E/4)
YYY is C- (A-1)x(B-1)
Congratulations to firstyferrets for solving this puzzle first and being first to find.