If you were supposed to get an email from the forum but didn't (e.g. to verify your account for registration), email Wes at stararmy@gmail.com or talk to me on Discord for help. Sometimes the server hits our limit of emails we can send per hour.
I don't know that mine needs an explanation, but I'm giving one, anyway.
It's a cross on a hill at sunset. At least for me, an empty cross at sunset is a pretty big representation of Jesus' death and resurrection. My faith is the biggest thing in my life, so I use it a lot.