Identifying Scorpius, the scorpion constellation, is a rewarding challenge for stargazers, especially those in the UK. This week offers a prime opportunity to spot the mythical adversary of Orion low in the southern sky.
Why Scorpius Is Hard to See from the UK
Scorpius is one of the most famous zodiacal constellations, but for observers in northern latitudes like the UK, it never fully rises above the horizon. The full constellation is best viewed from southerly regions, making it a frustrating target for British stargazers. However, with the right timing and a clear southern view, you can still catch its distinctive shape.
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Best Time to View Scorpius This Week
Look low in the southern sky at 11pm BST on 24 July. The constellation stays in roughly the same position all week, but on this night a bright waxing gibbous moon adds to the scene. The moon lies close to Antares, the red-orange star marking the Scorpion's heart.
Antares: The Rival of Mars
Antares means “rival of Mars” due to its striking reddish color. From Britain, it often appears to twinkle because it is viewed through thicker, more turbulent air near the horizon. In reality, Antares is a red supergiant star—vastly larger than the sun and nearing the end of its life. Its ruby jewel-like hue is unforgettable.
Scorpius vs. Orion: A Mythological Rivalry
In mythology, Scorpius is the creature sent to kill Orion, the hunter. The two constellations sit on opposite sides of the sky, so when Scorpius rises, Orion has already set. This celestial opposition makes spotting Scorpius a special treat for astronomy enthusiasts.
| Feature | Scorpius | Orion |
|---|---|---|
| Best Viewing Time | Summer evenings (July) | Winter evenings (January) |
| Brightest Star | Antares (red supergiant) | Rigel (blue supergiant) |
| Mythological Role | Adversary (scorpion) | Hunter |
| Visibility in UK | Low on horizon, partial | High overhead, full |
Key Takeaways for Stargazers
- Look south from a location with a low horizon for best results.
- Use Antares as a guide—it's the brightest star in Scorpius.
- Plan your viewing for late July when the moon enhances the scene.
- Remember that Scorpius is a summer constellation, opposite Orion in the sky.