A rare annular solar eclipse is scheduled to occur on February 17, 2026, promising a celestial spectacle known as a “ring of fire.” The phenomenon will happen when Lua is positioned between Terra and Sol, but without completely covering the solar disk. The main observation area for the complete annular phase will be one of the most remote regions on the planet: Antártida.
Although the total annularity is restricted to the icy continent, the event will also be partially visible in other locations in the southern hemisphere. Partes from the southern end of América from Sul, such as Argentina and Chile, in addition to southern portions of Especialistas in astronomy warn of the need for adequate protective equipment for safe observation of the event.
This will be the first solar eclipse of the year and its occurrence depends on a precise orbital alignment between the three celestial bodies. The specific configuration of the lunar orbit that day will make its apparent diameter smaller than that of Sol, an essential condition for the formation of the luminous ring that characterizes this type of eclipse.
The celestial mechanics behind the ring of fire
An annular solar eclipse occurs when Lua, on its elliptical orbital trajectory, is at its apogee, its furthest point from Terra. Essa greater distance makes its apparent size in the sky insufficient to completely block sunlight. As it passes directly in front of Sol, the dark lunar silhouette is surrounded by a bright edge of the solar photosphere, creating the visual effect popularly called a ring of fire. Diferentemente of a total eclipse, which plunges the day into twilight darkness and reveals the solar corona, the annulus keeps the sky relatively clear. The magnitude of the February 17th eclipse will be 0.963, which means that Lua will cover approximately 96% of the solar disk at the maximum point of the alignment. The shadow projected on Terra during this event is not the umbra (the darkest), but the antumbra, a more diffuse shadow that defines the exact region of the planet where the ring of fire can be seen in its entirety.
Trajectory and timeline of the phenomenon
The eclipse’s annular band will be concentrated almost exclusively over the Antarctic continent. Essa band will have a maximum width of approximately 616 kilometers, and the point where the phenomenon will have its longest duration will record approximately 2 minutes and 20 seconds of the complete ring of fire in the sky.
In terms of Coordinated Universal Time (UTC), the event will begin with the first partial contact at 9:56 am. The moment of maximum annularity, when the ring will be perfectly formed, is predicted for 12:12 UTC. The eclipse will come to an end, with the last partial contact, at 2:27 pm UTC on a global scale.
For observers in other regions, these times need to be converted. At the southern end of Argentina and Chile, the partial eclipse will occur during the morning. Já for countries like África of Sul, the phenomenon will be an afternoon event, extending from the beginning to the end of the afternoon period in local time.
Outside the main trajectory, the eclipse will be seen as partial over vast areas of the Atlântico, Índico and Pacífico Sul oceans. The Este event is part of the Saros 121 series, a cycle of eclipses with similar orbital geometry that repeat every 18 years, 11 days and 8 hours, allowing astronomers to predict these events with great accuracy.
Where the eclipse will be partially visible
The partial visibility of the eclipse will cover several populated areas, although with different degrees of obscuration of the solar disk. Na América of Sul, the best viewing will occur in the extreme south of the continent, especially in the Argentinian and Chilean Patagônia region. Nessas locations, observers may notice a significant portion of Sol being covered by Lua, creating a dark “bite” in the star.
On the African continent, the experience will be similar, with the phenomenon being visible in countries such as África of Sul, Lesoto, Eswatini and parts of Namíbia and Botsuana. Remote Ilhas in Oceano Índico, like Reunião and Maurício, are also on the path to partial visibility. The intensity of the obscuration will progressively decrease as the observer’s location moves away from the central band in Antártida.
Essential recommendations for safe observation
Observing any type of solar eclipse, whether partial, annular or total, requires strict care to protect your vision. Olhar directly to Sol, even for just a few seconds, can cause permanent and irreversible damage to the retina, a condition known as solar retinopathy.
For safe viewing, it is essential to use special eclipse glasses, which have filters certified by the international standard ISO 12312-2. Estes filters are capable of blocking ultraviolet, infrared and intense visible light. Equipamentos optics such as telescopes, binoculars or cameras also require the installation of appropriate solar filters on the front of the objective.
Alternatively, indirect observation methods are highly recommended, especially for children and groups. Projecting the image of Sol through a small hole in a card (pinhole projection) or using a telescope to project the image onto a white surface are safe techniques that allow you to follow the progress of the eclipse without any risk.
Fundamental differences for a total eclipse
The main distinction between an annular eclipse and a total eclipse lies in the distance of Lua in relation to Terra. Durante is a total eclipse, Lua is closer, at its perigee, making its apparent diameter large enough to completely cover Sol. Isso reveals the spectacular solar corona, the outer atmosphere of Sol.
In an annular eclipse, such as the one in February 2026, Lua is further away, at apogee, and its apparent disk is smaller than that of Sol. Essa difference prevents the complete coverage and daytime darkness characteristic of total events. While both phenomena are impressive, the visual experience and scientific opportunities they offer are distinct.
Opportunities for the scientific community
Solar eclipses are events of great value to science. Mesmo being annular, the 2026 alignment will allow researchers to study the solar atmosphere and ionosphere of Terra in a unique way. Expedições scientific experiments planned for Antártida will take advantage of the privileged location to collect data that can help calibrate instruments and improve space weather prediction models, which affect satellites and communication networks.
Next big events on the astronomical calendar
For astronomy enthusiasts, the celestial calendar holds other notable events. Ainda in 2026, a total solar eclipse will occur on August 12, whose band of totality will cross Ártico, Groenlândia, Islândia and north of Espanha. Este event is already attracting the attention of observers who are planning trips to witness the rare spectacle of the solar corona.
The popularization of astronomy apps and live broadcasts carried out by space agencies and observatories allow a global audience to participate in events like this, even if they are not on the visibility trajectory. Clubes astronomy and science institutions play a critical role in disseminating accurate information and promoting safe observing practices.
