Just hours after the spectacle (or otherwise) of the “Buck Moon Eclipse” comes a chance to see an almost full Moon make a perfect “summer triangle” with the Solar System’s two biggest planets.
Look up Sunday evening at dusk and you’ll be able to see the near-full “Buck Moon” around 99% illuminated, our satellite having turned “full” at precisely 04:44 UTC on Sunday, July 5, 2020. That’s 5:44 a.m. BST and 12:44 EDT.
Forming a perfect planetary triangle with the Moon over the constellation of Sagittarius will be the two gas giant planets Jupiter and Saturn, which not only appear close to each other at the moment, but are on the cusp of being at their brightest of the year—ready to observe soon after sunset and visible all night long.
Sunday night’s event is called a conjunction—a close passing of celestial objects that inevitably occurs as the Moon orbits and Earth and the planets orbit the Sun on almost the same plane.
When to see the Jupiter-Moon-Saturn conjunction on Sunday
UK and Europe
Only the Jupiter-Moon conjunction is visible from the UK and Europe. From the UK, look to the southeast from around 22:30 BST (though from 23:30 it’s probably easier to see) and you’ll have Jupiter above the southeastern horizon at dusk in conjunction with the near-full Moon. Look slightly to the left and you’ll also see Saturn.
Look again, this time to the southwest, just before sunrise and you’ll see that the Moon has moved between the two planets, almost forming a triangle.
Sadly the “perfect triangle” and the conjunction of the Moon and Saturn isn’t visible from the UK and Europe because they happen during the day when all three celestial bodies are under the horizon.
North America
The entire spectacle is visible from North America. On Sunday, look to the southeast from around 21:30 EDT (though from 22:30 it’s probably easier to see) and you’ll see Jupiter, Saturn and the Moon make a perfect triangle above the southeastern horizon. As the night wears on the Moon will drift closer to be in conjunction with Saturn.
When to see the Jupiter-Moon-Saturn conjunction on Monday
From most locations in the northern hemisphere our satellite—by now in the constellation of Capricorn—will, after dark, be visible to the left of Saturn and Jupiter. Look to the southeast. The Moon will appear much closer to the planets as seen from Europe; from North America there will be more separation, so it won’t be as much of a sight.
The next time the Moon will be in close conjunction with Jupiter and Saturn will be on October 22, 2020.
When to see the Moon and Mars in conjunction
Next weekend the Moon will be in conjunction with Mars. On Saturday, July 11, 2020, a 65%-illuminated waning gibbous Moon will be visible just 1.4° from an 84%-illuminated Mars. The closest apparent passing—the exact moment of conjunction—won’t be visible from the Europe or North America, but it will still make for a beautiful sight.
Wishing you clear skies and wide eyes.
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