Mercury, Venus and Jupiter Align on June 12 for a 30-Minute Post-Sunset Parade

Q: Tomorrow's rare planetary trio won't reappear until 2085. What is the key to getting a perfect view of this fleeting celestial event?

The key is precise timing and a clear horizon: be outside about 30 minutes after local sunset and make sure you have an unobstructed view low to the west or west-northwest. This planetary trio is fleeting because Mercury and Jupiter sink quickly into twilight, so the best viewing window lasts only about 30 to 45 minutes after sunset. Wait until the Sun is fully below the horizon for safety, then look for brilliant Venus first. Once you find Venus, scan down and slightly to the right to pick up Jupiter and Mercury, which will form a slanted line with it. Location matters as much as timing. A flat, open western horizon free of trees, buildings and heavy light pollution will give you the best chance, especially for Mercury, which is the hardest of the three to spot. Clear skies are essential, and letting your eyes adjust for 20 to 30 minutes will help in the bright twilight. The trio is visible to the naked eye, but binoculars will make Mercury much easier to see and can improve the overall view. A small telescope can show Venus’s gibbous phase, Mercury’s half-lit disk and Jupiter’s larger disk, though Jupiter’s low altitude may make it shimmer in turbulent air. For photographers, a smartphone can work, but a wide-angle or 50mm to 85mm lens is better. Frame the planets above a clean silhouette and expose for the twilight sky rather than overbrightening the foreground.

Q: Can your smartphone capture Mercury's half-moon phase in tomorrow's parade, or is advanced tech essential for the best view?

A smartphone can capture the parade itself, but not Mercury’s half-moon phase with any reliable detail. On June 12, a phone should be good enough to record Venus, Jupiter and Mercury as bright points in the twilight, especially in a wide shot of the western horizon. That matches the guidance in the skywatching reports, which say even a smartphone can photograph the alignment. Mercury’s phase is a different matter. Its disk is tiny, low in the sky and seen through thick, turbulent air near the horizon. Even the event guidance describes Mercury’s 50%-lit phase as a challenging target for amateur astronomers. A standard phone lens does not have the focal length or resolving power to show that half-lit shape clearly; at best, Mercury will look like a small dot. For the best chance of actually seeing Mercury’s phase, a small telescope is the key piece of equipment. Through a telescope, Venus should show a bright gibbous disk, Mercury a half-phase, and Jupiter a larger disk, though Jupiter may look soft because of atmospheric blur. A smartphone can still help if it is used afocally through a telescope eyepiece, but the telescope is doing the real work. So if your goal is a memorable photo of the mini parade, a smartphone is enough. If your goal is Mercury’s half-moon phase, advanced optics — at minimum a telescope — are essentially required.

3 articles · Updated · Space.com · Jun 11

A 30- to 45-minute viewing window opens about 30 minutes after local sunset on June 12, when Mercury, Venus and Jupiter line up low in the west-northwestern sky.
Venus will appear first in the bright twilight, with Mercury and Jupiter lower and slightly to its right as the three planets form a slanted line along the ecliptic.
Mercury has climbed out of the sun's glare to join Venus and Jupiter, though the two brighter planets have already separated somewhat since their close pairing on June 9.
For observers and photographers, the event offers both planet-to-planet visual contrasts—Venus about 80% illuminated and Mercury near 50%—and a wide-angle chance to frame the trio above a landscape silhouette.