Identifying Scorpius the Scorpion in the night sky is a rewarding challenge for stargazers. This week offers a prime opportunity to spot this famous zodiacal constellation, known in mythology as the creature sent to kill Orion the hunter. Because of this myth, Scorpius and Orion are positioned on opposite sides of the sky—when one rises, the other sets.
What Makes Scorpius Unique?
Scorpius is one of the most striking constellations in the southern sky. Its full form is best seen from southerly latitudes, but for observers in the UK, it can be frustratingly low on the horizon. The constellation never fully rises above the horizon, making it a challenge to track down. However, with the right timing and location, you can still enjoy its key features.
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Key Features of Scorpius
- Antares – The bright red-orange star marking the Scorpion’s heart, often called the “rival of Mars” due to its color.
- Curved tail of stars that forms the stinger of the scorpion.
- Visible low in the southern sky during summer evenings from the northern hemisphere.
How to Spot Scorpius from the UK
For stargazers in London, the best view is looking low in the southern sky at 11pm BST on 24 July. The constellation remains in roughly the same part of the sky all week. On this night, the bright waxing gibbous moon lies close to Antares, making it easier to locate. Antares appears ruby jewel-like, though from Britain it often twinkles due to being seen through thicker, more turbulent air near the horizon.
Antares: The Heart of the Scorpion
Antares is a red supergiant star, vastly larger than our sun and nearing the end of its life. Its name means “rival of Mars,” a reference to its reddish hue. In reality, Antares is one of the largest known stars, and its color is striking when viewed through binoculars or a small telescope.
Comparison: Scorpius vs. Orion
| Feature | Scorpius | Orion |
|---|---|---|
| Mythological Role | Adversary sent to kill Orion | Hunter |
| Position in Sky | Southern sky, low in UK | Northern sky, prominent in winter |
| Brightest Star | Antares (red supergiant) | Rigel (blue supergiant) |
| Visibility from UK | Partial, low on horizon | Full, high in sky |
Key Takeaways for Stargazers
- Look low in the southern sky after 11pm BST in late July.
- Use the moon near Antares as a guide on 24 July.
- Antares appears red-orange and may twinkle due to atmospheric turbulence.
- Scorpius never fully rises in the UK, but its heart and tail are visible.
FAQ
Why is Scorpius hard to see from the UK?
Scorpius is a southern constellation that never fully rises above the horizon in the UK, making it visible only low in the southern sky during summer.
What does Antares mean?
Antares means “rival of Mars” in Greek, referring to its reddish color that resembles the planet Mars.
When is the best time to see Scorpius?
Late July evenings around 11pm BST are ideal, especially when the moon is near Antares to help guide your view.