Astrarium

Astrarium

Offline planetarium, sky atlas

0 ratings
2 reviews
Free

Details

  • Released
  • Updated

Features

Astrarium video #1 for iPhone
Astrarium video #2 for iPhone
Astrarium video #3 for iPhone
Astrarium screenshot #4 for iPhone
Astrarium screenshot #5 for iPhone
Astrarium screenshot #6 for iPhone
Astrarium screenshot #7 for iPhone
Astrarium screenshot #8 for iPhone
iphone
ipad
watch
🖼️Get Icon
Icons↘︎

About

Explore the cosmos with an offline planetarium and sky atlas. View stars, nebulae, constellations, planets, and more with detailed information and adjustable time settings. Includes augmented reality features and export options.

✓Offline sky charting
✓Detailed star and object catalogs
✓Adjustable time and location settings
✓Augmented reality view
✓Meteor shower calendar
✓Satellite tracking
✓PNG/PDF export
Show original description

What's New in Astrarium

2.0

September 14, 2026

■ Now in 11 languages Japanese, English, Chinese (Traditional), Chinese (Simplified), Korean, Spanish, Portuguese, French, German, Czech and Polish. It is not only the interface. Constellation and star names, place and country names, and the moons of the planets are shown in the language you pick. Tap "EN" in the top bar to switch. ■ Observing sites follow the language The countries where your language is spoken come first in the site list, with their major cities ready to pick — 56 countries and regions, 216 places. If the device knows which country it is in, that country goes to the top. ■ The top bar has been rebuilt • Tap the magnitude figure to turn night vision (red screen) on and off; the red-dot button is gone • The menu button has moved to the right-hand end • The menus size themselves to their contents, so long place names are no longer cut off • The magnitude is always shown to one decimal place ■ Also • Aurora viewing sites now sit inside Observatories, at the bottom of the Region menu • Added Taoyuan, Taitung and Penghu in Taiwan, and Ondřejov in Czechia

More

User reviews

NO ENGLISH VERSION

I would love to use this app, but I could find no way for it to display anything it does in English. Where is the English version.? It was hidden from me. The developer has a real problem that needs to be fixed.

地平表示時に天の川が表示されません

天の川観測用にダウンロードしました。素晴らしいアプリです。全天表示時は問題ないですが、地平表示時には天の川が表示できません。今後のアプデに期待!

Response from developer

ご使用ありがとうございます。地平モードでも天の川を描画するようにしました(意図的にはずしておりました)。高高度で天の川が実際の見た目に近くなるよう(歪まないよう)に「心射図法」を追加しています。天の川は、NASAの公開データを使用するように変更し、天の川の濃さ(3段階)と輪郭(2段階)を選択できるようにしました。お試しください。

Developer apps

FAQ

What celestial objects can I see with Astrarium?

Astrarium displays 9,096 stars up to magnitude 8, 155 deep-sky objects like nebulae and galaxies, all 88 IAU constellations, the Milky Way, planets, the Moon, major meteor showers, and satellites like the ISS and Tiangong.

Does Astrarium work offline?

Yes, Astrarium is designed to work completely offline. All sky positions are computed on the device, so you don't need an internet signal to use it.

Can I export my observations from Astrarium?

Yes, Astrarium allows you to export your sky charts in PNG and PDF formats. This is useful for documenting observations or sharing them.

What are the augmented reality (AR) features in Astrarium?

Astrarium includes an AR mode that overlays the celestial chart onto your device's camera image. This helps you identify objects in the real sky.

How does Astrarium track satellites?

Astrarium plots satellites like the ISS and Tiangong on the chart using orbital elements (TLEs) fetched from CelesTrak. These TLEs are updated periodically and computed offline once fetched.

Is Astrarium suitable for beginners?

Astrarium is suitable for beginners and experienced users alike. It offers detailed information and adjustable views, making it easy to learn about the night sky.

Does Astrarium have ads?

No, Astrarium is completely ad-free. The app description explicitly states 'No ads, no in-app purchases, no account.'

What platforms is Astrarium available on?

Astrarium is available on Mac, iPhone, and iPad, as indicated by the supported devices list.