一台望远镜、一个楼顶，以及大量的天气A telescope, a rooftop, and a great deal of weather
四件里最新的，也是目前为止教给我最少的一件——主要是因为买望远镜的时候，我还没意识到这件事有一大半是等待。它是这几项里唯一一件真正意义上的户外活动。
The newest of the four, and the one that has taught me the least so far — mostly because I bought the telescope before I understood how much of it is waiting. It is the only hobby here that is genuinely outdoor work.
- 2025 年2025
- 北京的楼顶Beijing rooftops
- 0 —— 等第一个冬天0 — first winter pending
这里将会放什么What will be filed here
月面The moon
唯一不受城市光害影响的目标。沿着晨昏线拍环形山的影子，不同月相各来一次。
The one object a city sky cannot ruin. Crater shadows along the terminator, photographed at different phases.
行星Planets
木星和土星——主要是先学会一件事：在光学好之前，大气抖动才是真正的上限。
Jupiter and Saturn, which mostly means learning how bad atmospheric turbulence is before the optics ever matter.
观测日志Observation log
日期、视宁度、透明度，以及当晚到底看见了什么——包括什么都没看见的那些晚上。
Date, seeing, transparency, and what was actually visible — including the nights where nothing was.
器材笔记Equipment notes
赤道仪跟得住什么、跟不上什么，电池实际能撑多久，以及哪个配件是买错了。
What the mount does and does not track, how long the battery really lasts, and which accessory was a mistake.
成片是最容易、也是最后才有的那一步：水塔上方的一轮上弦月，从谁的楼顶拍都差不多。真正值得留下来的是观测日志——因为那是唯一记录了当晚的天空究竟做了什么的文件。
The image is the easy part and the last part: a first-quarter moon over a water tower looks roughly the same from everyone's rooftop. The log is the part worth keeping, because it is the only record of what the sky actually did that night.