# Astronomy > One- or two-semester introductory astronomy courses. Canonical page: [https://chrome-stats.com/d/com.rktech.astronomy](https://chrome-stats.com/d/com.rktech.astronomy) ## Overview - **ID:** `com.rktech.astronomy` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** RK Technologies - **Category:** EDUCATION - **Downloads:** 34,483 - **Rating:** 3.88 / 5 (251 ratings) - **Version:** 6.0.8 - **Last updated:** 2025-06-19 - **First published:** 2020-02-29 - **Publisher country:** IN - **Size:** 55 MB - **Data as of:** 2026-09-14 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.rktech.astronomy) - **Website:** [https://vdrktech.blogspot.com](https://vdrktech.blogspot.com/) - **Privacy policy:** [https://sites.google.com/view/rktechnology2019/home](https://sites.google.com/view/rktechnology2019/home) ## Description **Astronomy** is an engaging Chrome extension designed to support one- or two-semester introductory astronomy courses. It covers fundamental concepts about the universe beyond Earth, from observing the sky and understanding orbits, gravity, and radiation, to exploring stars, galaxies, black holes, and the origins of the cosmos. The extension offers valuable study strategies such as note-taking tips, creating study groups, and utilizing online resources. Each chapter includes intelligences, key terms, summaries, collaborative activities, and exercises to enhance learning. This comprehensive tool is perfect for students seeking to deepen their understanding of astronomy in an organized and interactive way. ## Rankings - #349,516 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.ACCESS_NOTIFICATION_POLICY` - `android.permission.ACCESS_WIFI_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.READ_APP_BADGE` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `com.anddoes.launcher.permission.UPDATE_COUNT` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.gms.permission.AD_ID` - `com.htc.launcher.permission.READ_SETTINGS` - `com.htc.launcher.permission.UPDATE_SHORTCUT` - `com.huawei.android.launcher.permission.CHANGE_BADGE` - `com.huawei.android.launcher.permission.READ_SETTINGS` - `com.huawei.android.launcher.permission.WRITE_SETTINGS` - `com.majeur.launcher.permission.UPDATE_BADGE` - `com.oppo.launcher.permission.READ_SETTINGS` - `com.oppo.launcher.permission.WRITE_SETTINGS` - `com.rktech.astronomy.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `com.rktech.astronomy.permission.C2D_MESSAGE` - `com.sec.android.provider.badge.permission.READ` - `com.sec.android.provider.badge.permission.WRITE` - `com.sonyericsson.home.permission.BROADCAST_BADGE` - `com.sonymobile.home.permission.PROVIDER_INSERT_BADGE` - `me.everything.badger.permission.BADGE_COUNT_READ` - `me.everything.badger.permission.BADGE_COUNT_WRITE` ## Review summary Users find the Astronomy app highly valuable and comprehensive for learning about astronomy, praising its well-structured content and offline availability. However, multiple reviews note issues with small text size that can't be adjusted, problematic dark mode visuals, app stability concerns due to crashes, intrusive ads without a premium option, and the inability to print or export content. Despite these drawbacks, the app is widely recommended and appreciated by astronomy enthusiasts and learners. ### Pros - Comprehensive and well-organized astronomy content covering a wide range of topics. - The app is very useful for learning astronomy and astrophysics with clear explanations and images. - Available offline, which makes it convenient for users to access information anytime. - Free to use, providing valuable knowledge without cost. - Recommended by users as a helpful resource for students and enthusiasts alike. ### Cons - Text size is too small on smartphones with no option to adjust, making reading difficult. - Dark mode reverses colors, causing photos to appear as negatives, which affects usability. - The app occasionally crashes or reboots during reading sessions, frustrating users. - Ads include autoplay videos with sound and there is no option to pay for an ad-free experience. - Lack of options to export or print content, such as generating PDFs, limits offline study or sharing. ## Similar extensions and apps - [Astronomy Textbook, MCQ, Tests](https://chrome-stats.com/d/com.quizover.app.course.col11992) — 21,151 users, 4.28 / 5 - [Cours d'Astronomie](https://chrome-stats.com/d/com.learnastronomy.coursefre) — 288 users - [Learn Astronomy - Course](https://chrome-stats.com/d/com.learnastronomy.course) — 287 users - [Curso de Astronomía](https://chrome-stats.com/d/com.learnastronomy.coursespa) — 259 users - [Learn Astronomy](https://chrome-stats.com/d/com.magicforstudio.astronomy) — 2,810 users - [Astronomy Course](https://chrome-stats.com/d/com.innovapps.cursodeastronomia) — 196,744 users, 3.00 / 5 - [Astronomy](https://chrome-stats.com/d/in.softecks.astronomy) — 3,247 users - [Astronomy: Learn Space Science](https://chrome-stats.com/d/com.bloomcodestudio.learnastronomy) — 6,287 users - [Astronomy](https://chrome-stats.com/d/com.sqsapps.astronomy) — 518 users - [Learn Astronomy Pro](https://chrome-stats.com/d/com.magicforstudio.astronomypro) — 17 users - [Astronomy Quiz](https://chrome-stats.com/d/com.cenim.astronomyquiz) — 2,549 users - [Astronomy, astrophysics](https://chrome-stats.com/d/com.dictionary.astronomy.cosmology.astrophysics.encyclopedia) — 32,627 users, 4.74 / 5 --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.rktech.astronomy)