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Mercury reaches its farthest point from the sun on June 15: a viewing guide
The smallest planet opens roughly three weeks of evening visibility low in the western sky, with Venus and Jupiter as bright reference points.
The smallest planet opens roughly three weeks of evening visibility low in the western sky, with Venus and Jupiter as bright reference points.
Mercury reaches its farthest apparent distance from the sun in the evening sky on June 15, opening a roughly three-week window for skywatchers willing to look low toward the western horizon after sunset — an event confirmed by NASA's June 2026 skywatching guide as part of a mini planetary gathering that also includes Venus and Jupiter.
Greatest elongation, the moment when an inner planet appears at its maximum angular separation from the sun as seen from Earth, is the most reliable time to catch Mercury without optical aid. The planet's tight orbit keeps it permanently close to the sun in the night sky, so it tends to vanish into twilight glare. On June 15, Mercury stands far enough from the sun to clear that glare for a short window after sunset, then slips back toward the sun's vicinity over the following weeks.
The geometry is straightforward. Mercury is an inner planet, orbiting inside Earth's path around the sun, so it never strays into the high, dark sky the way Mars or Jupiter can at opposition. Outer planets shine all night when Earth passes between them and the sun; inner planets only peek out near sunrise or sunset, when the sun sits just below the horizon. The trade-off is structural: a tighter orbit, a more confined viewing window, and a brighter backdrop to search through.
That makes bright neighbors useful. About half an hour to 45 minutes after sunset on June 15, Venus and Jupiter will be the obvious landmarks in the western sky, according to a Space.com skywatching guide on the event. NASA also confirms Mercury joins this planetary line-up from June 11–15, creating a three-planet alignment low in the west after sunset. Mercury hangs below Venus and Jupiter, closer to the horizon, with a thin waxing crescent moon nearby. The diagonal of bright planets serves as a pointer: scan down from Venus and Jupiter toward the horizon, and Mercury sits along that line.
Locating Mercury is only half the task. The planet will sit low in the sky, so a clear, unobstructed view to the west matters more than a dark site. Trees, buildings, or hills along the western horizon can hide the planet entirely, and any haze will swallow the faint point of light. Binoculars help: sweep the area just below Venus and Jupiter, and Mercury usually pops out as a steady, slightly yellowish point distinct from twinkling stars. Exact altitude depends on latitude, and northern observers typically get a lower, harder-to-find Mercury than viewers closer to the equator.
The window does not close on June 16. Mercury remains visible low in the west for several days before and after greatest elongation, gradually losing altitude as it approaches the sun. By early July, the planet will be too close to the sun's glare to see in the evening. The transition ends around July 12, when Mercury reaches inferior conjunction, the point in its orbit where it sits directly between Earth and the sun, and reappears in the predawn sky a week or so later.
The June 15 date is the easy catch, framed by Space.com as one of the best opportunities of the year to spot Mercury after sunset, though that superlative is the outlet's framing rather than a measured ranking. What is measurable is the geometry: a low western horizon, a bright pointer line of planets, and a window that lasts long enough to make a second attempt if clouds interfere on the first night.