KStars 是一款自由授權 (GNU General Public License (GPL), Version 2)、開放原始碼且跨平台 (支援 Linux、MacOS、Windows 和 Android) 的天文學軟體。無論在任何日期和時間，從地球上的任何地方，它都能提供準確的夜空圖形化模擬，能顯示一億個星體、一萬三千個深空物體與八個系內行星、還有太陽與月亮以及數千個慧星、小行星、超新星和衛星。
對於學生與教師來說，它支援了可調整的模擬速度以檢視在極長的時間尺度下發生的現象，KStars Astrocalculator 可用來預測天體會合，也可以用來計算許多常見的天文學數據。
對於業餘天文學家來說，它提供了觀測計劃器、天空日曆工具及 FOV 編輯器來計算裝備的視野並予以顯示。在「今晚有什麼」工具中尋找有趣的目標、繪製任何物體的高度與時間關係圖，列印高品質的天空圖，並取得大量資訊與資源來協助您探索宇宙！
這款免費軟體內含 Ekos 天文攝影套裝軟體，這是一套可以控制所有 INDI 裝置的完整解決方案，其中包含了眾多望遠鏡、CCS、DSLR、聚焦器、濾光片以及許多其他東西。Ekos 使用線上與離線的天體測量計算程式、自動對焦與自動導航功能進行高精度追蹤，並使用功能強大的序列管理程式來擷取一張或多張照片。
天文類別：
包含星等 8 的預設類別
包含到星等 16 的一億個星體的額外類別
可下載的分類，包括 Messier images、Abell Planetary Nebulae、Sharpless Catalog、Lynds Dark Nebula Catalog 等
歲差、地軸震動與大氣磨擦修正
顯示線上資料庫的工具
§ 作業系統：Windows 7/8/10/11
§ 官方網站下載頁面
§ 檔案下載
§ KStars for Android (5.0 以上) 下載頁面
KStars 原文簡介：
The program is free, open source, cross-platform Astronomy Software. It provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time. The display includes up to 100 million stars, 13,000 deep-sky objects, all 8 planets, the Sun and Moon, and thousands of comets, asteroids, supernovae, and satellites.
For students and teachers, it supports adjustable simulation speeds in order to view phenomena that happen over long timescales, the KStars Astrocalculator to predict conjunctions, and many common astronomical calculations.
For the amateur astronomer, it provides an observation planner, a sky calendar tool, and an FOV editor to calculate field of view of equipment and display them. Find out interesting objects in the “What’s up Tonight” tool, plot altitude vs. time graphs for any object, print high-quality sky charts, and gain access to lots of information and resources to help you explore the universe!
Included with the program is Ekos astrophotography suite, a complete astrophotography solution that can control all INDI devices including numerous telescopes, CCDs, DSLRs, focusers, filters, and a lot more. Ekos supports highly accurate tracking using online and offline astrometry solver, autofocus and autoguiding capabilities, and capture of single or multiple images using the powerful built in sequence manager.
Short summary of important features:
• Graphical simulation of the sky with the planets, up to 100 million stars, 10000 deep-sky objects, comets and asteroids. Adjustable simulation rate.
• Access to several internet resources for information, imagery and data
• Complete astrophotography workflow
• A host of tools that predict conjunctions, plot time variation of positions of planets, perform calculations etc.
• Powerful observation planner to plan your observations.
