The second supermoon of 2025, known as the Castor supermoon, will be visible across Brazil from this Wednesday (5), remaining in the sky for three consecutive days. The phenomenon occurs when the full moon coincides with perigee, a point at which the satellite is less than 360,000 kilometers from Earth, resulting in an appearance up to 14% larger and 30% brighter. Observation can be done with the naked eye, without the need for equipment, as long as the sky is clear. The event will also be enjoyed in different countries, depending on weather conditions.
- Visibility times: In São Paulo, moonrise occurs around 6:45 pm; in Recife, at 5:28 pm; and in Belém, at 6:14 pm.
- Ideal conditions: Locations with a clear horizon favor observation.
- Duration: The phenomenon lasts until Friday (7), with peak brightness on Wednesday.
Visibility in Brazil
The supermoon can be seen in all regions of the country, if the weather is favorable. Astronomers recommend locations away from urban lights for better appreciation. The phenomenon does not require telescopes, but binoculars can highlight details of the lunar surface.
What is a supermoon
The term supermoon describes the full moon at perigee, when it is closest to Earth. This proximity amplifies its size and brightness in the night sky. The Castor supermoon is the largest of 2025, surpassing the first occurrence of the year. According to experts, the eventThis occurs a few times a year, but not always with the same intensity. The Moon’s elliptical orbit causes perigee to occur monthly, but it is only called a supermoon in the full phase.
Best observation conditions
The ideal observation occurs just after sunset, when the moon rises above the horizon. Clear skies are essential, and rain in some regions may make visibility difficult. Elevated locations, such as hills or rural areas, offer better conditions. In urban centers, light pollution may reduce brightness, but the moon will still be visible.
Curiosities about the phenomenon
Although astronomers avoid the term supermoon, it has gained popularity for its simplicity. The phenomenon does not directly affect weather or tides in any significant way, but it does inspire observational events.
Visual and cultural impact
The Castor supermoon has fascinated observers with its intense brightness and apparent size. In several cultures, the full moon is associated with celebrations and traditions, increasing interest. Astronomical events like this attract both astronomy amateurs and professionals.
Tips for enjoying the event
For a complete experience, look for places with low light pollution and a clear horizon. Binoculars or telescopes can enrich observation, revealing craters and lunar seas. Avoid areas with lots of clouds, and check the local weather forecast.