How to Observe

Orientation, equipment, light pollution, safety and practical techniques for finding objects in the sky.

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Pessoa de costas observando um céu noturno estrelado sobre montanhas e um lago, com pontos celestes brilhantes e a Via Láctea ao fundo.

How to Observe27/09/20267 min read

Planets or stars? How to tell them apart with the naked eye

Learn to combine twinkling, position along the ecliptic, height above the horizon, brightness, and movement across nights to recognize planets without relying on an app.

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Binóculo preto sobre uma rocha ao lado de um telescópio em tripé sob um céu estrelado com a Via Láctea.

How to Observe20/09/20267 min read

10x50 Binoculars or a Telescope: Which Should You Choose for Stargazing?

Compare 10x50 binoculars and telescopes by targets, portability, budget, ease of finding objects, and level of detail before your first purchase.

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Observador com telescópio diante de um céu noturno que passa do brilho urbano alaranjado para uma região escura com Via Láctea visível.

How to Observe20/09/20268 min read

Bortle Scale: how to judge your sky's light pollution and know what you can still see

Learn the nine Bortle classes, estimate your sky without equipment, and set realistic expectations for the Milky Way, stars, and deep-sky objects.

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Observador em silhueta ao lado de um tripé diante de um céu estrelado, com um cone claro de luz zodiacal subindo do horizonte oeste após o pôr do sol.

How to Observe13/09/20266 min read

Zodiacal Light in September 2026: In Most of Brazil, Look After Sunset — Not Before Dawn

For most of Brazil, September favors zodiacal light in the west after evening twilight. Learn when to try, how moonlight matters, and how to distinguish it from urban skyglow.

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Observador e telescópio sob céu estrelado, com Lua iluminada, uma estrela alaranjada e a região de Sagitário diante da faixa da Via Láctea

How to Observe07/09/20265 min read

Moon, Antares and Sagittarius’ Teapot: how to navigate the sky from September 14 to 20

A night-by-night guide to using the Moon as a reference, finding Antares and recognizing Sagittarius’ Teapot from September 14 to 20, 2026.

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Grupo observa uma Lua grande no céu noturno brasileiro com telescópio e binóculos em um mirante urbano.

How to Observe04/09/20265 min read

International Observe the Moon Night 2026: how to take part from Brazil on Sept. 19 and use the Southern Hemisphere map

A practical guide to joining the global Moon-observing night on September 19, finding or hosting events in Brazil, and using the correct lunar map.

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Lua brilhante sobre horizonte montanhoso sob a faixa da Via Láctea, com uma estrela avermelhada e um agrupamento de estrelas sugerindo o Bule de Sagitário.

How to Observe01/09/20267 min read

Moon as a September sky guide: find Antares, the Teapot and Milky Way center, Sept. 14–20

Use the Moon as a moving reference from September 14–20 to locate Antares, the Sagittarius Teapot, and the direction of the Milky Way’s center.

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