Your Android observatory with real-time sky view, AR, telescope control, and the only astronomy app that computes your local horizon from topographic data.
Recommended for new users. Start with the freemium app and unlock premium later with a subscription or one-time purchase.
Prefer paying once up front? Get Mobile Observatory Pro on Google Play. The same lifetime premium access is also available later inside Mobile Observatory.
Everything you need for astronomy, in your pocket
Point your phone and identify stars, planets, and constellations live
Explore planets, moons, and comets in an interactive orrery
ISS passes, Starlink trains, and 10,000+ satellites in real-time
2,500+ nebulae, galaxies, and star clusters with photos and details
50+ event types including eclipses, conjunctions, occultations, transits, and more
Aurora alerts, solar flares, ISS passes, and event reminders
Aurora forecast, Kp-index, solar flares, and NASA SDO images
Phases, eclipses, lunar features, sunspot data, and rise/set times
Real terrain profiles from NASA data for precise rise/set times
Auto-generated session plans based on your equipment and location
Connect your GoTo telescope and slew to any object with a single tap
Hipparcos, SAO, and extended catalogs with detailed star data
See Mobile Observatory in action
From first launch to expert observer
Point your phone at the sky and see stars, planets, and the Sun's path over your real 3D terrain.
Browse upcoming conjunctions, eclipses, ISS passes, and thousands of celestial objects with detailed data.
Generate optimized observing plans, control your telescope, and log your observations like a pro.
Scroll through real app screens — tap to enlarge






Whether you're observing deep sky objects, planning an astrophoto shoot, or chasing the perfect Milky Way rise — these tools help you get the shot and the view
The only astronomy app that knows what your actual horizon looks like. Know exactly where and when the Moon, Sun, or Milky Way will rise behind the mountains — perfect for planning landscape astrophotography.
Never miss an astronomical event again. Mobile Observatory watches the sky for you and sends personalized alerts based on your location and interests.
Get a personalized, guided list of the best objects to observe tonight based on your location, equipment, and sky conditions.
Connect and control your computerized telescope directly from the app. Slew to any object with a single tap.
Frame your shot before you set up. See exactly how any object will look through your telescope or camera lens — ideal for planning astrophotography compositions.
Tools for astronomers, astrophotographers, and anyone who looks up
Explore the solar system in an interactive 3D view
Track the ISS, Starlink, and thousands more
Point your camera and explore the sky
Real-time aurora and solar activity dashboard
Personalized recommendations for your location
Massive astronomical database at your fingertips
Plan your observing sessions in advance
Detailed Sun and Moon information
Fresh 5-star feedback from astronomers around the world
"The update to version 4 brings several interesting graphical and functional improvements. It's incredibly realistic; the horizon profile at your observation location allows for more precise calculations of star rises and sets. The 3D view has been significantly improved, with updated graphics for the well-rendered planets, and every astronomical event is faithfully reproduced. A full 5 stars for this beautiful app, an indispensable tool for both amateur and professional astronomers."
"If you're wondering which special objects are in the constellation you're looking at right now, and when they can best be observed, then this app is exactly right for you. I've tried just about every astronomy app out there. My conclusion: by far the most valuable app for amateur astronomers who want to explore the night sky themselves with their own telescope."
"This app is simply fantastic and keeps getting better. It offers a huge variety of features, making it the most professional app in the Play Store."
"Version 4 is amazing: intelligently programmed, very well organized. Thank you for this excellent work!"
New users should begin with the freemium app, then unlock premium inside the app when they are ready. If you prefer buying up front, Mobile Observatory Pro remains available as the classic paid edition.
Recommended for all new users
Classic paid edition for users who prefer a separate upfront purchase
The story behind Mobile Observatory
Creator of Mobile Observatory
Wolfgang Zima spent years as a professional astronomer before finding his way into software development. After completing his PhD in Astronomy at the University of Vienna, he worked as a postdoctoral researcher at the Institute for Astronomy at KU Leuven in Belgium for five years. It was there that he discovered a passion for scientific software — writing tools for analyzing spectra of pulsating stars and building a CCD image simulator for ESA's PLATO mission, a space telescope searching for Earth-like exoplanets.
Mobile Observatory started almost by accident: when his Nokia phone broke on a mountain biking trip in late 2010, Wolfgang got his first Android phone and was surprised that no good astronomy apps existed. So he built one. First released in January 2011, Mobile Observatory has since grown into one of the most comprehensive astronomy apps for Android and has been continuously improved for well over a decade.
Wolfgang lives in Freiburg, Germany, where he works as a Senior Mobile Developer at sevdesk. He continues to develop Mobile Observatory with the same enthusiasm as on day one — now with the help of modern AI tools that let him bring new features to life faster than ever.
The search term "julie 2 isaimini top" refers to the 2017 Bollywood erotic thriller movie
, specifically being searched for on the popular Tamil movie distribution site Isaimini. The film marked the Hindi debut of South Indian actress Raai Laxmi and serves as a sequel to the 2004 film Julie. Movie Summary
Plot: The story follows a simple girl who pursues her dream of becoming a famous actress. To achieve stardom, she eventually succumbs to the casting couch and compromises her values. Just as she tries to change her path and finds faith in Christianity, she is targeted in a murder attempt during a jewelry store robbery, leading to a mystery investigated by ACP Devdutt.
Cast: Starring Raai Laxmi as Julie, with supporting roles by Ravi Kishan, Pankaj Tripathi, Rati Agnihotri, and Aditya Srivastava. Release Date: November 24, 2017.
Reception: The film was generally panned by critics for its dated screenplay and logic-defying plot, earning it a "disaster" label at the box office with only ₹2.25 crore in collections. Availability julie 2 isaimini top
The 2017 film Julie 2 , starring Raai Laxmi, has been a frequent subject of searches on piracy platforms like Isaimini, a prominent site known for leaking Indian cinema. While the film was marketed as a bold erotic thriller, its legacy is heavily tied to the controversy surrounding its producer, Pahlaj Nihalani, and its widespread unauthorized distribution. The Film: Julie 2 (2017)
Julie 2 is a sequel-in-name-only to the 2004 film Julie. Directed by Deepak Shivdasani, it follows the journey of a simple girl named Sumitra (Raai Laxmi) as she navigates the "murky waters" of the film industry to become a superstar. Cast and Crew:
Raai Laxmi: Playing the dual role of Sumitra Devi and Julie. Pankaj Tripathi: Portrays Ashwini Asthana. Ravi Kishan: Featured as Ravi Kumar. Nishikant Kamat: Plays Mohit, a romantic interest.
Narrative and Reception: The plot involves a mix of glamour, betrayal, and a surprise murder mystery that is eventually investigated by ACP Dev Dutt (Aditya Srivastava). Despite Raai Laxmi's efforts to carry the film, critical reception was largely negative, with some reviewers giving it zero stars due to a perceived lack of sense and over-reliance on skin display. The Piracy Connection: Isaimini The search term "julie 2 isaimini top" refers
Isaimini is a notorious public torrent and download website that primarily targets Tamil-speaking audiences. It has gained a massive following by leaking movies in various languages, including Hindi, Telugu, and English, often within hours of their theatrical release.
If "Julie 2" refers to a movie or a song, and you're looking for information about it being available on a platform like Isaimini Top, here are some general steps or features one might look for:
After its theatrical and TV premiere, Julie 2 largely disappeared from legal circulation. It is not available on major OTT platforms like Disney+ Hotstar, Zee5, or Sony LIV in many territories. For a viewer curious about the infamous bold scenes, piracy becomes the only perceived option.
To understand the piracy demand, we must first understand the film itself. Julie 2 is a sequel to the 2004 hit Julie, which starred Neha Dhupia. However, the sequel is a standalone story. Develop a User Interface: Design a user-friendly interface
The film follows the story of Julie, a struggling actress in the Mumbai film industry. She navigaes the dark underbelly of Bollywood—sexual exploitation, power struggles, and betrayal. The plot is infamous for its bold and explicit content, including several steamy scenes and a controversial scene involving a live wire electrocution during a sexual act.
Upon release, Julie 2 was slammed by critics. It currently holds a near-zero rating on several review aggregators. However, controversy sells. Because of its "A" (Adults Only) certificate and the curiosity surrounding Raai Laxmi's performance, the film became a late-night cult curiosity for a niche audience.
For a mid-budget film like Julie 2, piracy via sites like Isaimini can be financially crippling. Lost ticket sales and legitimate streaming revenue directly affect the filmmakers, distributors, and crew members who rely on box office collections and digital rights deals.
Identify the Content: Clarify what "Julie 2" is. Is it a movie, a TV show, or perhaps a music album? Understanding its nature will help in creating a relevant feature.
Isaimini Context: If "Isaimini" is related to piracy or a content downloading platform (noting that Isaimini is known for providing free access to Tamil movies and other content), your feature might involve:
"Top" Feature: If "top" refers to a ranking or a list: