Stargazers across Catalonia are poised for a spectacular celestial event this weekend, with a rare planetary alignment making up to four planets visible to the naked eye. Jupiter, Venus, Saturn, and the elusive Mercury will feature in the evening sky shortly after sunset, offering a free and captivating show. However, the prospect of cloudy skies, particularly on Saturday, may play spoilsport for many hopeful observers.
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The event, scheduled for the weekend of 28 February and 1 March 2026, is part of a broader “planetary parade” that also features the distant ice giants Uranus and Neptune. Although all six planets will technically gather in the same sky sector, only the four classical planets, known since antiquity, will appear bright enough for naked-eye viewing. These alignments occur due to the planets’ orbits around the sun, creating the illusion of a gathering from our perspective on Earth.
How and When to Watch
To catch the show, observers should look towards the western horizon just after the sun has set. This brief window of twilight is the prime viewing time. According to the Catalan news outlet betevé, which first reported on the local visibility, three of the planets will be clustered low in the sky.
The brilliant Venus, often called the “Evening Star,” will be the easiest to spot. Nearby, observers will find the ringed planet Saturn and the most challenging of the quartet, Mercury. Due to its proximity to the sun, Mercury will appear very low on the horizon and set shortly after dusk, making its appearance fleeting.
Higher in the sky, the gas giant Jupiter will dominate, shining brightly for most of the night. On Saturday evening, it will appear particularly close to the Moon, creating a striking duo. The celestial gathering of these four worlds presents a unique opportunity for both amateur astronomers and casual sky-watchers.
The ‘Invisible’ Duo and Expert Insight
While the lineup technically includes six planets, the two most distant worlds in our solar system, Uranus and Neptune, will not join the naked-eye party. Their faintness and vast distance mean only powerful binoculars or a telescope can reveal them.
Astrophysicist and science communicator Joan Anton Català explained the challenge to betevé. He noted that even with good equipment, one would need to know exactly where to look to distinguish them from the countless background stars. “In practice, for the average user, they will not be visible,” he stated. For those with a keen interest in deeper space observation, institutions like Barcelona’s renowned Fabra Observatory or the Montsec Astronomical Park are centres for such advanced stargazing.
Weather Forecast Casts a Cloud
Unfortunately, the biggest obstacle to witnessing this cosmic display will be Earth’s own atmosphere. The official forecast from the Servei Meteorològic de Catalunya (Meteocat) suggests that viewing conditions will be difficult.
Meteocat expects widespread cloud cover across most of Catalonia on Saturday evening, making the chances of a clear view in Barcelona and surrounding areas “very complicated,” according to their initial report. Sunday’s forecast offers slightly more optimism, though it still predicts low clouds in several regions. The MeteoMuntanya service also warns of potential fog in some of the Mediterranean mountain massifs, which could obscure views from higher elevations.
A Fleeting Glimpse
This specific alignment is a brief celestial meeting. After this weekend, Mercury and Saturn will dip closer to the sun’s glare each day, disappearing from the evening sky.
However, the two brightest planets, Venus and Jupiter, will continue to grace our evenings for several more weeks. They will remain as brilliant beacons in the twilight sky, offering a consolation prize if clouds obscure anyone’s view this weekend.
