A rare celestial spectacle is scheduled for February 17, 2026, when an annular solar eclipse will project the famous effect known as the “ring of fire.” The phenomenon will occur when the Lua is positioned directly between the Terra and the Sol. However, due to its orbital distance, the lunar disk will not completely cover the star, leaving a bright solar edge visible.
The main observation area for the complete annular phase will be one of the most remote regions on the planet: Antártida. Cientistas and enthusiasts on the frozen continent will have a privileged view of the alignment. Além of Antártida, a wide area of the southern hemisphere will witness a partial eclipse, including the extreme of América of
This astronomical event marks the first solar eclipse of the year 2026 and attracts attention not only for its beauty, but also for the scientific opportunity it represents. Especialistas warn, however, of the need to use appropriate protective equipment for observation, as looking directly at Sol, even during an eclipse, can cause permanent damage to vision.
What defines the annular eclipse
An annular solar eclipse occurs due to a precise cosmic coincidence, dictated by the elliptical orbit of Lua around Terra. The phenomenon happens when Lua is at its peak, the furthest point from our planet. Nessa position, its apparent diameter in the sky is smaller than that of the Sol, making it unable to fully cover the solar disk during alignment. Como result, instead of a total blockage causing darkness, the dark silhouette of Lua is surrounded by an intense, luminous ring of the solar photosphere. Essa characteristic appearance earned the event the popular nickname “ring of fire”. Diferentemente of a total eclipse, where the solar corona becomes visible to the naked eye, in the annulus the brightness of the ring prevents observation of the outer solar atmosphere, and the sky remains relatively clear throughout the event. The shadow cast on Terra during this type of eclipse is called antumbra, a region where Sol appears as a ring around Lua.
The path of the ring of fire across the globe
The annular band of the February 17, 2026 eclipse will be almost exclusively over the Antarctic continent, making its direct observation a logistical challenge. The antumbral shadow of Lua will follow a path that crosses Antártida, reaching a maximum width of approximately 616 kilometers. The point where the phenomenon will last the longest will record around 2 minutes and 20 seconds of the complete ring of fire, a moment awaited by scientific expeditions strategically positioned in the region.
Outside this central band, the event will be visible as a partial eclipse over an extensive area of the oceans Atlântico Sul, Índico and Pacífico Sul. On the South American continent, the best observation conditions will be in the extreme south of Argentina and Chile, in regions such as Terra of Fogo. Na África, countries like África of Sul, Namíbia, Botsuana, Lesoto and
Essential guidelines for safe observation
Eye safety is the main concern when observing any type of solar eclipse. Olhar directly to Sol without the correct protection, even for a few seconds, can cause serious and permanent damage to the retina, a condition known as solar retinopathy. The intensity of sunlight remains dangerous even when part of the disk is covered.
For safe viewing, it is essential to use specialized eclipse glasses, which have filters with international ISO 12312-2 certification. Estes filters are designed to block ultraviolet, infrared, and intense visible light to safe levels. Óculos common sun shades, even the darkest ones, do not offer sufficient protection and should not be used.
Other safe methods include the use of solar filters suitable for telescopes and binoculars, which must be attached to the front of the equipment, or projecting the Sol image onto a flat surface. A simple and effective technique is to create a darkroom out of a cardboard box, allowing the eclipse image to be projected indirectly. Supervision of children is essential during all observational activities.
Locations with confirmed partial visibility
At América of Sul, the visibility of the partial eclipse will be restricted to its southern tip. Cidades as Ushuaia, at Argentina, and Punta Arenas, at
On the African continent, Cidade of Cabo, in África of Sul, will witness a partial eclipse during the afternoon, as will other areas in neighboring countries. The percentage of solar obscuration will progressively decrease for observers located further north.
Remote islands located in the southern oceans, such as Ilhas Malvinas and some sub-Antarctic islands, will also be in the partial visibility zone. Para navigators and research teams in these regions, the event will be an additional spectacle in the sky.
This eclipse belongs to the series Saros 121, a cycle of eclipses that repeat every 18 years, 11 days and 8 hours. Cada event in an Saros series shares similar geometry and characteristics, allowing astronomers to predict and study these phenomena with great precision over time.
The scientific relevance of the phenomenon
Although it does not reveal the solar corona like a total eclipse, the 2026 annular eclipse offers valuable opportunities for the scientific community. The passage of the edge of Lua through the solar disk allows astronomers to study in detail Sol’s chromosphere, a thin layer of its atmosphere located just above the photosphere.
Furthermore, the event is crucial for geodesy, the science that measures and understands the shape, orientation and gravitational field of Terra. Accurately observing eclipse contact times at different locations helps refine models of the lunar orbit and detect small variations in Terra’s rotation.
Event schedule in universal time
According to astronomical calculations, the eclipse will begin globally at 09:56 at Horário Universal Coordenado (UTC). The maximum annular phase, when the ring of fire will be perfectly formed at the central point of the trajectory, will occur at 12:12 UTC. The event will come to an end in all locations at 14:27 UTC, when Lua completely moves away from the solar disk.
Striking differences for a total eclipse
The main difference between an annular and a total eclipse lies in the experience of the observer and the visible phenomena. Durante the maximum phase of an annular eclipse, the sky does not darken drastically as in a total eclipse. The light from the solar ring is intense enough to maintain daytime lighting, although of a different quality.
Phenomena associated with totality, such as the “beads of Baily” (points of light passing through the valleys of Lua) and the “diamond ring”, are less pronounced or absent in an annular event. Mais Importantly, the solar corona, the magnificent outer atmosphere of Sol, remains completely obscured by the glow of the photosphere, being visible only during a total eclipse.
Other astronomical events on the calendar
The year 2026 will be particularly interesting for astronomy lovers, as it will feature a second solar eclipse. On August 12, a total solar eclipse will be visible in a band that crosses Ártico, Groenlândia, Islândia and Espanha, promising a spectacle of daytime darkness for millions of people.
Preparation for these events begins years in advance. Comunidades of amateur and professional astronomers organize expeditions, public events and live broadcasts to share the experience with a global audience. Careful planning ensures that both safe observation and scientific data collection can be carried out successfully.
