Comet C/2025 R3 (PanSTARRS) developed a second tail as it approached Terra on April 26, a phenomenon captured by NASA and Agência Espacial Europeia solar observation instruments. The ionic tail, narrower than the main one, changed direction and started pointing directly away from Sol. The comet came within 72 million kilometers of the planet during its closest point.
The event was documented by the Observatório Solar and Heliosférico (SOHO) coronagraph, an instrument that blocks sunlight to capture images of phenomena around the star. The images show a rare spectacle, as PanSTARRS completed its approach path after months of anticipation in the astronomical community.
Como comets form two different tails
Comets develop tails as they approach Sol and heat up. Solar radiation causes material in the comet’s solid nucleus to sublimate, releasing dust and gas into space. The heaviest dust particles are repelled by sunlight, forming a wide, often curved tail that reflects sunlight well.
Enquanto That is, the ultraviolet radiation from Sol strips electrons from the gas molecules present in the comet’s coma — the cloud of gas and dust that surrounds it — in a process called ionization. The resulting charged particles are captured by the solar wind, creating the second tail, which is straighter and points directly away from Sol.
The difference in motion between the two tails occurs because the solar wind, which travels at hundreds of kilometers per second, drives the ionic particles with greater force. The larger dust particles move at a slower speed and stay behind, creating the visual effect of two tails with different trajectories.
Descoberta and PanSTARRS trajectory
Comet C/2025 R3 was discovered in September 2025 and quickly generated excitement among observers. Muitos speculated whether PanSTARRS could become the great comet of 2026, capable of shining bright enough to be visible to the naked eye. The object traveled toward Sol for months, passing through perihelion — its closest point to the star — on April 19.
Após reaches maximum proximity to Terra, the comet will continue its return journey to the outer regions of the solar system, in an orbit that appears to be unique and not repeated. Este path marks an exceptional passage, making this a unique observation opportunity for amateur and professional astronomers.
Observação and visual documentation
Images captured by SOHO reveal the ion tail glowing as the comet passed close to Sol. The coronagraph, equipment specialized in blocking direct sunlight, made it possible to document details that would be invisible in conventional observations. The dust tail, wider and loaded with solid material, visually contrasts with the ionic tail, which is thinner and straighter.
PanSTARRS’ dust tail can extend for millions of kilometers and reflects sunlight well, creating spectacular visual effects in long exposure photographs. Observadores in different parts of the planet recorded images of the comet shining in the night sky, with the yellow-orange glow typical of icy bodies heated by solar radiation.
Características physics and behavior of the comet
- Distância at closest approach: about 72 million kilometers from Terra
- Data from perihelion (closest point to Sol): April 19, 2026
- Data closest approach to Terra: April 26, 2026
- Orbit Tipo: apparently unique, no expected return
- Main Observation Instrumento: Coronógrafo SOHO (NASA/ESA)
- Visibilidade: sufficient for observation in photographs and potentially with the naked eye in ideal conditions
The comet provided astronomers with valuable data on the behavior of cometary bodies during solar approach. Documenting changes in the ionic tail contributes to knowledge about the interaction between comets and the solar wind, a phenomenon that continues to be the subject of study in modern astronomy.