Sky on Schedule shows when eclipses, meteors, planets, comets, and other phenomena can be seen from Brazil and explains the time, direction, and equipment needed to observe them.
Explore articlesThe most important content to start with.
The new Moon favors faint stars and deep-sky viewing; first and last quarter reveal lunar terrain through shadows. Compare phases, brightness, and observing windows.
Read articleOther selected strategic content.
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.
Read article
Compare 10x50 binoculars and telescopes by targets, portability, budget, ease of finding objects, and level of detail before your first purchase.
Read article
Learn the nine Bortle classes, estimate your sky without equipment, and set realistic expectations for the Milky Way, stars, and deep-sky objects.
Read articleBrowse the blog main topics.
Peak dates, best viewing times, Moon conditions and where to look to observe meteor showers from Brazil.
Planets & Conjunctions5 articlesVisible planets, oppositions, close approaches and apparent meetings in the sky.
Moon & Occultations3 articlesOccultations, encounters between the Moon and other celestial bodies, and lunar phenomena relevant to observation.
Sky Calendar1 articleMonthly and annual calendars of upcoming astronomical phenomena relevant to observers in Brazil.
How to Observe7 articlesOrientation, equipment, light pollution, safety and practical techniques for finding objects in the sky.
Recent posts and new content.
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.
Read article
On October 12, Mercury reaches greatest eastern elongation, about 25° from the Sun. Learn when and where to look from Brazil and how to adjust the timing for your city.
Read article
Saturn reaches opposition on October 4 and stays visible for nearly the whole night. See how to choose the viewing time in Brazil and what to expect with the unaided eye, binocular...
Read article
The peak falls on October 21–22, but the best observing begins after moonset. See the dark windows for five Brazilian cities and how to choose where to look.
Read article
Opposition makes Neptune more favorable for observing, but not bright enough to see without optical aid. Learn what changes, how to locate the planet, and which conditions help in ...
Read article
A night-by-night guide to using the Moon as a reference, finding Antares and recognizing Sagittarius’ Teapot from September 14 to 20, 2026.
Read article
Venus reaches the peak brightness of this evening apparition on September 18. Learn where to look, the best viewing window and how to identify it without a telescope.
Read article
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.
Read article
The September 26 full Moon is called the Harvest Moon because of a Northern Hemisphere tradition. See why the name does not match Brazil's seasons or harvest calendar and how to ob...
Read articleContent with the most views.
Peak dates, best viewing times, Moon conditions and where to look to observe meteor showers from Brazil.
The peak falls on October 21–22, but the best observing begins after moonset. See the dark windows for five Brazilian cities and how to choose where to look.
Read articleNo articles published yet.
Visible planets, oppositions, close approaches and apparent meetings in the sky.
On October 12, Mercury reaches greatest eastern elongation, about 25° from the Sun. Learn when and where to look from Brazil and how to adjust the timing for your city.
Read articleSaturn reaches opposition on October 4 and stays visible for nearly the whole night. See how to choose the viewing time in Brazil and what to expect with the unaided eye, binocular...
Read articleOpposition makes Neptune more favorable for observing, but not bright enough to see without optical aid. Learn what changes, how to locate the planet, and which conditions help in ...
Read articleVenus reaches the peak brightness of this evening apparition on September 18. Learn where to look, the best viewing window and how to identify it without a telescope.
Read articleOccultations, encounters between the Moon and other celestial bodies, and lunar phenomena relevant to observation.
The new Moon favors faint stars and deep-sky viewing; first and last quarter reveal lunar terrain through shadows. Compare phases, brightness, and observing windows.
Read articleThe September 26 full Moon is called the Harvest Moon because of a Northern Hemisphere tradition. See why the name does not match Brazil's seasons or harvest calendar and how to ob...
Read article
On September 26, the full Moon helps locate Saturn and Neptune. Saturn is visible to the naked eye; Neptune requires binoculars or a telescope.
Read articleMonthly and annual calendars of upcoming astronomical phenomena relevant to observers in Brazil.
The equinox starts astronomical spring in the Southern Hemisphere, but refraction, the solar disk, and latitude prevent an exact 12-hour split.
Read articleNo articles published yet.
Sky on Schedule is an observational astronomy guide focused on Brazil. We explain eclipses, meteor showers, planets, comets, conjunctions, occultations, and other phenomena with an emphasis on dates, times, visibility, and real observing conditions. Articles distinguish astronomical predictions from weather conditions, identify the sources used, and make clear when a phenomenon requires equipment or special precautions.
