Mercury–Venus Conjunction Tonight: How and When to Watch the Rare Planetary Alignment

Skywatchers have a rare and visually striking event to look forward to tonight as Mercury and Venus align in a close planetary conjunction on January 29, 2026. The two inner planets will appear just 0.5 degrees apart, roughly equal to the apparent width of the full Moon, creating a fleeting but memorable celestial pairing in the evening sky.

This conjunction is considered special because such close alignments between Mercury and Venus are infrequent. After tonight, observers will have to wait until March 2027 for a similarly tight encounter between the two planets.

When and Where to Look

The conjunction will be visible low in the western sky during twilight, beginning approximately 30 to 45 minutes after sunset. At peak visibility, Mercury and Venus will hover 8 to 12 degrees above the horizon, making timing critical. Observers should have a clear, unobstructed view of the western horizon to maximise their chances of spotting the planets before they sink below the skyline.

Venus, the brighter of the two, will shine with a strong white glow and act as an easy reference point. Mercury, slightly dimmer and tinged with a subtle orange-white hue, will appear very close by, giving the impression of a paired or “double planet” display.

Under clear skies and low light pollution, the conjunction should be visible to the naked eye. Binoculars or a small telescope can enhance the view, revealing sharper planetary discs and making Mercury easier to identify.

Why Viewing Requires Extra Care

Because the conjunction occurs close to the Sun’s position in the sky, observers must exercise caution. Residual sunlight during twilight can overwhelm the planets and pose a risk if viewed improperly.

Astronomers recommend using an “artificial eclipse” method to improve visibility and safety. This can be done by positioning a building, tree, or wall to block direct sunlight while keeping the western sky in view. Certified eclipse glasses or solar filters may also help reduce glare, but never look directly at the Sun without approved eye protection.

As twilight deepens, visibility improves briefly before both planets dip below the horizon, typically within 40 minutes of sunset.

Why This Conjunction Matters

Although Mercury orbits the Sun at about 36 million miles and Venus at roughly 67 million miles, their paths occasionally align from Earth’s perspective. Events like this highlight the dynamic geometry of the Solar System and its constantly shifting alignments.

For astronomers, such conjunctions provide opportunities to study planetary brightness, atmospheric scattering, and orbital mechanics. For casual observers, they offer a rare chance to see two planets share the same small patch of sky.

Tips for the Best Experience

• Choose a viewing spot away from city lights

• Check local sunset times and be ready early

• Use astronomy apps like Stellarium or SkySafari to pinpoint the exact location

• Keep binoculars handy but start with the naked eye

• Prioritise eye safety at all times

This Mercury–Venus conjunction is brief but rewarding. For those who catch it, the sight serves as a reminder that even familiar planets can still surprise us when timing and perspective align just right.