光年传音Lightyear Letter
理念：Idea: 隔得再远，这封信也会落在 TA 的坐标上。However far apart, the letter lands where they are.
写下两个人的名字、出生城市和想说的话，一段 3D 影片带着这封信从银河系出发，经过八大行星落到地球，再拆开。可以保存成 MP4 视频。Write two names, birth cities and a few lines. A 3D film carries the letter from the Milky Way past the eight planets to Earth, where it opens. Save it as an MP4.
解决：Solves: 把想说的话做成一段能看、能保存的宇宙影片Turns what you want to say into a space film to watch and keep
适合：For: 想给异地的 TA、家人或朋友写一封特别的信的人Anyone writing a special letter to someone far away
填好寄信人和收信人、出生城市、想说的话和纪念日期，影片从银河系出发，依次经过八大行星和太阳，落到两人的出生城市，最后打开信封，信件逐字出现。可以保存成竖屏、方形或横屏的 MP4 视频，也可以生成图片。全程在浏览器里完成，信件只保存在这台设备上，不上传。地球影像来自 NASA 公有领域资料，未绘制国界线。Fill in sender and recipient, birth cities, your message and a date. The film starts at the Milky Way, passes the eight planets and the Sun, lands on both birth cities, then opens the envelope and the letter appears word by word. Save it as a portrait, square or landscape MP4, or as a picture. Everything runs in your browser; the letter stays on this device and is not uploaded. Earth imagery is NASA public-domain material, with no borders drawn.