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Science
Jun 18, 2026
Analyzed by Llama- 4 Scout 17B 16E Instruct

Rare Twilight Conjunction: Sliver of Moon and Bright Venus

AI Summary
A silver sliver of the moon and the bright planet Venus will create a delightful twilight conjunction this week, visible in the constellation of Cancer.

The Rare Alignment

A silver sliver of the moon joins the bright beacon of Venus this week for a delightful twilight conjunction. The moon will be just over three days old and only 11% of its visible surface will be illuminated.

The Event Details

Venus will be burning brightly and less than a moon’s width away from our natural satellite. The pair will be situated in the constellation of Cancer, the crab. The chart shows the view looking west from London at 21.45 BST on 17 June 2026. From the UK, the pairing will be low in the sky, so choose the clearest western horizon you can find.

Astronomical Highlights

  • The moon will be just over three days old.
  • Only 11% of the moon's visible surface will be illuminated.
  • The conjunction will be visible in the constellation of Cancer.

The Impact Analysis

This would also be a fine target if you happen to have a pair of binoculars handy. However, do not start sweeping them across the sky until the sun has completely set below the horizon. Even a glimpse of it through any optical device can permanently damage your eyesight.

Viewing Tips

From the southern hemisphere, the conjunction should be easier to see because it happens earlier in the evening and somewhat higher in the sky.

The Prediction

Astronomy enthusiasts should look out for the Earthshine in the unilluminated portion of the disc as the sky darkens. This is the sunlight reflected from Earth on to the moon and back again.