About关于
About Terrastra关于寰星
Terrastra is a free 3D planet toy for curious kids and the grown-ups who explore with them. Spin the Earth, zoom in to find landmarks, animals, ships, planes and trains, then keep zooming out — past the Moon and the planets to the Milky Way and the cosmic web.
寰星是一个免费的 3D 星球玩具，送给好奇的孩子和陪他们一起探索的大人。转动地球、放大寻找地标、动物、轮船、飞机和火车；再一路缩小——越过月球和行星，直到银河系和宇宙大尺度结构。
What you can do可以做什么
518 things on the globe地球上的 518 个条目Every landmark, animal and journey is a small 3D model drawn in code.每个地标、动物和旅程都是用代码绘制的小 3D 模型。
Solar System to cosmos从太阳系到宇宙Zoom through the planets, the Milky Way, the Local Group and superclusters.缩放穿越行星、银河系、本星系群和超星系团。
Sky theatre星空剧场Watch eclipses, meteor showers and the night sky as they really happen.按真实时间观看日食月食、流星雨和星空。
Collect, snap and play收集、拍照与游戏Stamp your passport, take photos and play map games.在护照里盖章、拍照，并玩地图游戏。
Your data你的数据
This edition runs entirely in your browser: your collection, photos and game records stay on this device.
这个版本完全在浏览器中运行：你的收藏、照片和游戏记录都保存在这台设备上。
Credits致谢
Original 3D models原创 3D 模型Every model, planet and nebula is generated procedurally in code — no downloaded meshes or photos.所有模型、行星和星云都由代码程序化生成，没有下载任何网格或照片。Terrastra
three.jsthree.jsThe WebGL 3D engine.WebGL 3D 引擎。MIT
Natural Earth · world-atlasNatural Earth · world-atlasCountry shapes and borders, decoded with topojson-client.国家轮廓与边界，使用 topojson-client 解码。Public domain · ISC
NASA Visible Earth · GEBCONASA 可见地球 · GEBCOLand elevation and ocean depth behind the globe’s mountains, snow lines and sea floor.地球上的山脉起伏、雪线和海底深浅所用的陆地高程与海洋深度数据。Public domain
Wikipedia维基百科Longer articles in the in-app reader, loaded live from Wikipedia.应用内阅读器中的长篇文章，实时从维基百科加载。CC BY-SA 4.0
Radio BrowserRadio Browser 电台目录The live radio stations on the globe: a free, community-run directory. Streams come straight from each station.地球上的直播电台：一个免费、社区维护的电台目录。声音直接来自各个电台。Public domain
Meeus · JPL · EspenakMeeus · JPL · EspenakPositions of the Sun, Moon and planets, eclipses and ΔT (Astronomical Algorithms; JPL Keplerian elements).太阳、月球和行星的位置，日月食与 ΔT（《天文算法》、JPL 开普勒根数）。Published algorithms
Geist · Chakra PetchGeist · Chakra PetchTypefaces for reading, data and display.正文、数据与标题字体。SIL OFL 1.1