With the equinox here, we saw some really interesting data for Journey North today. So interesting we decided to spend most of our school day exploring it.
Pictured is our photoperiod graph. As you can see, all the photoperiods from around the world are converging around the 12 hour mark for the equinox.
We were also told that sunrise today in Greenwich, England was 06:03 UT (Universal Time, a.k.a. GMT) then given a table with the sunrise in UT for our 10 mystery classes we are trying to find. It takes the earth 4 minutes to move 1 degree west, so we could calculate our longitude based on this information. I made the calculation for all 10 locations, though the one we're focusing on is E 6.5 degrees (we already figured out from our photoperiod that it was N 4 degrees.) It looks to be in Cameroon, which for our family was quite special since the Pope wrapped up his visit to that country just yesterday.