enjoy a dark, clear sky filled with stars It's one of those simple luxuries we often savor on vacation, far from the light pollution of cities. When we finally look up calmly, the question arises naturally: "Okay, so what is all that I'm seeing?" That's where augmented reality applications come into play, and increasingly, the smart glasses and mixed reality headsets, which turn the sky into an interactive map.
Today, you don't need to be an astronomer or memorize the classic zodiac figures to orient yourself in the sky. With the help of specialized apps, modes of real-time planetarium, AR and mixed realityYou can point to any spot above your head and instantly discover which constellation, star, planet, or even galaxy is in front of you. Furthermore, some devices allow you to go even further: travel back in time to see what the sky looked like centuries ago, simulate the heavens from other parts of the world, or overlay detailed data about each celestial object onto the real image.
Enjoy the sky with augmented reality apps
One of the most accessible ways to start exploring the sky is by using your mobile phone as a pocket planetarium with augmented realitySimply download one of the multiple apps availableActivate geolocation and point your camera at the area of the sky you're interested in. In real time, you'll see the constellations drawn on the screen, the main stars highlighted, and labels with names, facts, and interesting details displayed.
Among the applications that function as a universal guide to the sky, the concept of "Star Guide" apps or similar stands out, turning the phone into a live interactive star mapWhen you raise the device, it automatically adapts to your location and orientation, allowing you to see exactly what's above you and how the sky will move over the next few hours.
These types of apps usually offer a mode of augmented reality (AR) overlay over the camera image. That is, you don't just see a black map with dots, but the actual image of your surroundings with the constellation lines and the planet names floating above them. This makes it much easier to identify whether what you're seeing is, for example, Jupiter or just a bright star. Many of these features are available in apps like Sky Map.
In addition to the live view, many apps include 3D views of stars and planets so you can virtually zoom in on celestial objects and explore their features. In some cases, you can even rotate them and examine surface details, orbits, or inclinations, which also makes them a powerful educational tool; for example, apps like Stellarium They offer this type of visualization in high quality.
Another very interesting point is the possibility of receiving notifications of the best observation timesSome apps notify you when a planet reaches a good height above the horizon, when the The International Space Station will be visibleor when a major event such as a meteor shower or eclipse is approaching.
Advanced features: time travel and location change
The best astronomy apps don't just tell you what's above your head right now. Many include a feature that... “Time travel” to simulate the sky at different points in the past and future. Thanks to a time slider or an integrated calendar, you can see, for example, what the sky looked like 500 years ago or what it will look like in a few months at the same time.
This temporary function is very useful for plan observation sessionsYou can check when a particular constellation will be best positioned, predict the apparent path of the Moon throughout the night, or decide which day is best to head out into the countryside with your telescope. Some apps even show a continuous 24-hour movement of a star, so you can clearly see its trajectory across the sky. If your goal is photography, it's also advisable to consult guides such as Tips for photographing stars with your mobile phone before leaving.
Another key option is the ability to change the virtual preview location. the sky from other points on the planetImagine you're going on a trip to another hemisphere: thanks to these tools you can see in advance which new constellations will appear, which stars you will stop seeing, or how the Milky Way moves at different latitudes.
In certain apps, when you select a star or planet you get a card with data such as distance, brightness, type of object and other interesting factsThis adds a very interesting learning dimension. For beginners, many developers include "basic" modes with less information and a clearer visual presentation, and other "advanced" modes with highly detailed catalogs designed for demanding enthusiasts.
Universe2go and the augmented reality glasses for the sky
If you want to go beyond just using your mobile phone, there are specific devices such as Universe2go, augmented reality glasses Designed for observing the night sky with added immersion, they work in conjunction with a smartphone, which is placed on top of the glasses to project information onto a system of mirrors directly into your field of vision.
Universe2go's packaging and hardware are quite well done: the glasses come with neck strap, carrying bag and multilingual manualThe mobile phone holder is based on pre-cut foam pieces according to the size of the device, allowing for a firm and customized fit for various models (although some very large phones do not fit).
Unlike typical cardboard viewers, here you don't see the world through your phone's camera. The phone is held above your eyes, and mirrors are used to project the image generated by the app. superimposes on the direct view of the skyThe effect, when properly configured, is reminiscent of Google Glass designed for astronomy: you continue to see the real stars while lines, names, and data appear floating in your field of vision.
This projection system achieves a very realistic effect whenever Adjust the brightness carefully. depending on the darkness of the surroundings. In very dark places, it's advisable to lower the screen brightness considerably to avoid dazzling your eyes and still clearly see the stars in the real sky; practical guides on this can be helpful. night photography with your mobile phone.
Setup and calibration: what you need to know
With Universe2go, a critical point is the phase of initial setup and calibrationThe printed manual covers the basics but falls somewhat short on practical aspects that are key to a good experience: how to correctly position the strap for hanging the glasses, how to adjust the distance between eyes, or how to repeat the calibration process if something goes wrong.
After installing the application (it is important to look for the appropriate “International” version to avoid language problems), when you open it you are offered two modes: one Free “Star Map” modewhich you can use without glasses, and a paid "Planetary" mode that requires entering a license code included in the box. Once the full mode is activated, you also choose your preferred eye (left or right) to display certain menu items only on that side.
It's during calibration where most users encounter difficulties. The app starts speaking in English and displays a series of circles to adjust the smartphone's position inside the glasses. In theory, it should then also allow the configuration of the interpupillary distance, but in some models that phase does not appear clearly, which can cause double images to appear when you start using the system.
The added problem is that, once calibration is complete, it is not always obvious how restart the process from within the application itself.On certain iOS devices, for example, you have to go into the general system settings, find the Universe2go app, and manually activate the "reset calibration" option for the assistant to reappear when you start the app.
Android even offers the option to manually enter the interpupillary distance measured with a special rulerHowever, on iPhone this feature can be somewhat hidden. Some menu translations don't help either: options like "Eye Relief" instead of something clearer like "pupil distance" can be confusing when trying to fix the double image problem.
Practical use of Universe2go and quality of content
Once the most complicated part of the setup is over, Universe2go really starts to shine as immersive personal planetariumIts database of stars, planets, constellations, galaxies, and other deep-sky objects is very extensive, and when you fix your gaze on one of them, a narrative is activated with information about its history, mythology, astronomical data, and position in the sky.
The audio is primarily available in English, and while the amount of spoken information is enormous, the lack of dubbing or voiceovers in Spanish This might put some users off. Furthermore, some sections mix languages in menus or have somewhat sloppy translations, with long texts that don't fit well on the screen or are cut off.
The application is controlled by head movements to navigate menusFor example, looking down accesses the main menu, from where you can change display modes, turn music on or off, or adjust some settings. There are also specific gestures to pause the audio by moving your head, although they aren't always detected with the desired accuracy.
Universe2go includes several observation modes: one designed for beginner users, with less object saturation There are simpler explanations, and others geared towards advanced amateur astronomers, showcasing many objects that are not visible to the naked eye but can be seen with a telescope. Among the striking features is the real-time tracking of the International Space Station, whose position is represented by its movement across the sky, just as it actually does.
Overall, the combination of a Well-built hardware with powerful but improvable software This makes the overall experience very appealing to astronomy enthusiasts willing to invest time in mastering the setup. However, the kit's price, around €99, places it in a range where a certain level of polish in the interface and translations becomes expected.
Skygaze and mixed reality with VR headsets
Beyond dedicated AR glasses for astronomy, experiences are beginning to emerge mixed reality designed for VR headsetsA striking example is Skygaze, an application for Oculus/Meta Quest that transforms your living room into an immersive planetarium thanks to the Passthrough function: the headset uses its external cameras to display the real environment, over which a digital night sky is superimposed.
The process begins by identifying the real walls of your room with the controlsOnce the space is defined, the virtual ceiling slowly retracts, revealing a sky filled with stars, planets, and constellations, all precisely positioned according to your geographic location and local time. If you want to see more of the sky, you can lower the walls to widen your field of view.
Skygaze is still under active development, but even in its free demo version for App Lab it offers highly visual and immersive contentIt allows you to search for and identify celestial objects from your sofa, consult basic information about them, and also features a 360° cinema-style space where an educational film about the Solar System is projected.
Among the developer's future ideas is the incorporation of a virtual telescope within the mixed environmentThis would allow users to zoom in on specific details of the Moon, planets, or star clusters. A version designed for more advanced mixed reality devices, such as high-quality passthrough headsets geared towards extended immersive experiences, is also being considered.
These types of proposals point to a future in which smart glasses and MR viewers will not only serve for general leisure, but also as top-notch astronomy educational toolsintegrating the real sky with layers of interactive information and scientific simulations.
Star Walk 2 and the “Star Spotter” AR mode
Among the most comprehensive mobile apps, the following stand out: Star Walk 2, a very popular astronomy guide covering a wide range of celestial objects: stars, constellations, planets, artificial satellites, comets, asteroids, the International Space Station and even the Hubble Space Telescope.
One of its star features is “Star Spotter”, which allows you to see a live representation of the sky that synchronizes with your movementsTo activate it, simply tilt your device upwards or tap the compass icon in the top left corner of the screen. From then on, rotating your phone will automatically update the star map based on the direction you're pointing.
To enter Star Walk 2's augmented reality mode, simply touch the camera icon located in the upper right cornerThe app overlays a map of celestial objects onto the real image captured by the camera, creating a "drawn" sky effect on your physical surroundings. With the side sliders, you can adjust parameters such as the intensity of the overlay or the amount of information visible on the screen.
This hybrid approach makes it very easy, both day and night. learning to recognize constellation patterns and quickly locate planets or satellites. Furthermore, the integrated astronomical calendar makes it easy to track the year's major events: conjunctions, planetary oppositions, meteor showers, lunar and solar eclipses, etc.
The app also incorporates features such as a simulated visual telescope, a "time machine" to view the sky on other dates, and a daytime AR mode that displays interesting information even when the sky is not dark, adding a powerful fun and educational component for use at any time.
Other recommended apps for identifying constellations
In addition to tools focused on augmented reality and smart glasses, there is a broad ecosystem of astronomical applications that work as The perfect complement to learning about the skyMany of them use the mobile phone's GPS and orientation sensors to offer accurate views of the sky based on the user's position.
SkyView Lite, for example, is a free app that uses the mobile phone's camera to easily detect and identify celestial objectsDay or night, simply point towards the sky to see names, trajectories and basic data appear, ideal for beginners who don't want to get bogged down with too many options.
Another veteran is Star Walk 2 (already discussed), along with proposals such as Google Sky Map, a kind of basic celestial map which lets you know what you're seeing in each area of the sky, or classic Sky Map on Android, highly recommended for beginners because of their ease of use: you point the camera and immediately know what constellation or planet you have in front of you.
There are also more encyclopedic apps, such as Vortex, with a database that is around 20.000 celestial objects among constellations, Messier and Caldwell catalogsmeteor showers and galaxies. Many include calendars of astronomical events, monthly ephemerides, and time regulators for viewing the sky on any date.
Others, like StarChart, calculate the real-time position of stars visible from Earth, display more than 5.000 stars from both hemispheres, and provide detailed information on distance, magnitude and brightness by tapping on each object. And if you're looking for something even more professional, there are solutions like Stellarium or Luminos for iOS, with millions of cataloged stars, telescope control, and extremely high-precision views.
In any case, all these applications form a perfect ecosystem to complement the use of smart glasses or mixed reality headsetsYou can plan what you want to see on your mobile, and then enjoy it immersively using AR, MR or specific devices like Universe2go.
By combining mobile phones, augmented reality glasses, and mixed reality headsets, we now have an incredible array of tools for easily recognize constellations, stars and planetsWhether on vacation under a dark sky or from the comfort of your living room, taking full advantage of all these options involves choosing the right app for your skill level, spending a few minutes configuring and calibrating your device, and above all, rediscovering the simple habit of looking up at the sky and being amazed by what's out there.
