Scorpius is one of the most dramatic constellations in the entire sky — a sprawling, curved shape dominated by the blazing red supergiant Antares. Rich in open clusters, globular clusters, and Milky Way star fields, it is a summer showpiece from UK latitudes.
From UK latitudes, Scorpius hugs the southern horizon in summer, making it elusive but unmistakable. The key is to find Antares — one of the reddest and most distinctive bright stars in the sky — and let the scorpion's curved body unfold from there towards the rich Milky Way.
Scorpius sky chart — Antares (α, red supergiant) dominates the head region. The scorpion's body curves down through Sargas to the tail ending at Shaula (the stinger). M4 globular cluster sits just 1.3° west of Antares; M6 and M7 open clusters lie near the tail.
The easiest way to find Scorpius is to locate Antares — a distinctly red-orange star low in the south during summer evenings. It is one of the few naked-eye stars whose colour is unmistakable. From the UK, look due south on clear July and August evenings; Antares will be typically 10–15° above the horizon. From further south in Europe, it climbs much higher.
From Antares, the body of Scorpius curves upward (north-east) towards a trio of brighter stars forming the head — Graffias, Dschubba, and Jabbah. Then follow the body downward (south-west) as it curves towards the tail ending at the stinger stars Lesath and Shaula. The entire pattern is 25° long — impressive even from UK latitudes.
The Summer Triangle (Vega, Deneb, Altair) is high overhead in July evenings. Face south with the Summer Triangle behind you and look to the horizon — Scorpius will be there. Sagittarius lies just to the left (east) of Scorpius along the Milky Way, and together these two constellations mark the direction toward the galactic centre.
From the UK (51°N), Scorpius is at its highest — around 15° — due south at approximately midnight in mid-June, 10pm in mid-July, and 8pm in mid-August. The constellation sets by late evening in September. Travel to southern France, Spain, or further south to see Scorpius at truly impressive heights of 30–45° above the horizon.
Scorpius is notoriously low from UK latitudes — a consequence of its southern declination of about −40°. From central Europe (latitude 45°N) it climbs to ~25°, and from the Mediterranean (~36°N) it reaches 35° or more — transforming it from a horizon-hugging curiosity into a magnificent object. If you are travelling to Spain, Portugal, or further south in summer, Scorpius is a must-observe target on any clear night.
| Month | Southing Time (UK) | Max Altitude (51°N) | Conditions |
|---|---|---|---|
| May | ~02:00 | ~12° | Poor — very low, late night |
| June | ~00:00 | ~15° | Good — at midnight |
| July | ~22:00 | ~15° | Best — evening hours, still light horizon |
| August | ~20:00 | ~14° | Good — early evening |
| September | ~18:30 | ~10° | Poor — sets soon after dark |
Scorpius is dominated by one of the most extraordinary stars in the galaxy — Antares, a red supergiant so vast it would swallow every planet out to the asteroid belt if placed at the centre of our solar system. The constellation boasts several other noteworthy stars along its dramatic curved form.
One of the largest and most luminous stars visible to the naked eye. Antares has a diameter roughly 700 times that of the Sun — if placed at our solar system's centre, its surface would extend beyond the orbit of Mars. It is a slow semi-regular variable and will eventually explode as a supernova. Its name means "rival of Ares (Mars)" due to its similar red colour. A faint blue-white companion (mag 5.4) is visible in larger telescopes.
The second brightest star in Scorpius, marking one of the two "stinger" stars at the tip of the tail. Shaula is a spectroscopic binary and a Beta Cephei pulsating variable, varying by a tiny amount with a period of just over 5 hours. Together with Lesath (υ), it forms the famous "cat's eyes" pair at the scorpion's sting.
The third brightest star in Scorpius, Sargas has a warm yellow-white colour contrasting with the bluer stars elsewhere in the constellation. It is a bright giant much more evolved than the Sun, having exhausted its core hydrogen. The name "Sargas" comes from Sumerian and is one of the most ancient stellar names, dating back at least 3,000 years.
Also known as Acrab, Graffias is a remarkable multiple star system. It appears as a wide double in a small telescope (separation 14 arcseconds), with primary and secondary components both being hot blue-white B-type stars. The primary is itself a spectroscopic binary, and there are additional distant companions, making it a complex multiple system totalling at least five stars.
Dschubba surprised astronomers in 2000 when it suddenly brightened from magnitude 2.32 to 1.59 — becoming the brightest star in Scorpius and rivalling Antares. It is a rapidly rotating Be star that periodically ejects a disc of material, causing its brightness to surge. This eruption phase continues to this day, making it one of the most dramatic stellar changes in recent memory.
Lesath forms a striking naked-eye pair with Shaula — the two stinger stars at the tip of the scorpion's tail. Despite appearing close together in the sky (just 0.5° apart), Lesath is considerably further away than Shaula, so they are not physically related. The pair resembles the famous Double Double or Mizar–Alcor in its visual pairing effect.
Scorpius is one of the few modern constellations whose shape genuinely resembles its namesake — a curved, hook-tailed scorpion. Universally recognised as a dangerous creature in ancient cultures, it plays a pivotal role in the mythology of the night sky.
The most dramatic Greek myth surrounding Scorpius involves its eternal conflict with Orion, the great hunter. Several versions exist: in one, Artemis sent the scorpion to kill Orion after he boasted he would hunt every animal on Earth. In another, Gaia (Earth) herself created the scorpion to punish the hunter for his arrogance. In a third, Orion attempted to assault Artemis, and she summoned the scorpion in retaliation.
Whatever the cause, the scorpion stung Orion and killed him. The gods placed both creatures in the sky, but on opposite sides to prevent further conflict — which is why Orion is a winter constellation and Scorpius a summer one. As Orion sets in the west, Scorpius rises in the east, and vice versa. The two constellations never appear in the sky simultaneously from mid-northern latitudes.
In Mesopotamia, Scorpius was one of the oldest recognised constellations, appearing in Babylonian star catalogues as the "creature with the claws." The Sumerians had identified it at least 5,000 years ago. In Babylonian astronomy, Scorpius marked the month of harvest and was associated with the goddess of death and rebirth.
As a zodiac constellation, the Sun passes through Scorpius from roughly 23 November to 29 November — one of the shortest passages of any zodiac sign due to its actual size in the sky being smaller than astrological tradition suggests. The International Astronomical Union includes a thirteenth constellation along the ecliptic — Ophiuchus, the serpent bearer — which sits between Scorpius and Sagittarius, though it is not included in traditional Western astrology.
The scorpion that killed Orion. Both were placed in the sky on opposite sides so they could never meet — Orion flees as Scorpius rises, and Scorpius sets as Orion returns.
One of the oldest recognised star patterns, appearing in Babylonian star catalogues as "GIR.TAB" (the scorpion). It was associated with Ishhara, goddess of love, and marked the month of harvest.
The hook of Scorpius is the magical fish hook of the demigod Māui, with which he fished the North Island of New Zealand up from the ocean floor — one of the most important constellation myths in Polynesian culture.
Known as "Ka Makau Nui o Māui" — the great fish-hook of Māui. The Milky Way is the sea, and Antares is a guide star. The constellation was used for ocean navigation and to mark the seasons for fishing.
The stars of Scorpius form part of the Azure Dragon (青龍, Qīng Lóng), one of the four mythological creatures of Chinese astronomy. Antares (心宿二, Xīn Sù Èr) means "second star of the heart" and was a royal star used to foretell the fate of the emperor.
Scorpius lies in the direction of the galactic centre, making it one of the richest regions of sky for open clusters, globular clusters, and nebulae. Even a small telescope reveals a succession of spectacular objects as you sweep along the Milky Way from head to tail.
The easiest globular cluster in the entire sky to find — just 1.3° west of Antares, making it an obvious binocular object. M4 is one of the nearest globular clusters to Earth and one of the most loosely structured, making it relatively straightforward to resolve individual stars at the edges. A striking bar of stars crosses its centre in a 150mm telescope at medium power.
One of the finest naked-eye objects in the sky — a large, rich open cluster easily visible without any optical aid as a bright patch in the Milky Way near the scorpion's tail. Ptolemy described it in 130 AD, making it one of the oldest recorded deep-sky objects. Binoculars reveal roughly 80 stars in a beautiful scattered pattern. It is best viewed at low power to appreciate its full extent.
A rich open cluster that has a butterfly-shaped outline when viewed through binoculars or a small telescope. M6 lies about 3.5° north of M7, and both fit in the same binocular field. The cluster contains roughly 120 stars, dominated by hot blue-white stars, but the prominent orange variable star BM Scorpii (a K supergiant) gives the eastern wing a warm golden tint — the butterfly's "body."
One of the most densely packed globular clusters in the Milky Way, M80 lies halfway between Antares and Graffias. Its extremely compact core resists resolution into individual stars even in large amateur telescopes — it appears as a bright, unresolved ball. In 1860, a nova (T Scorpii) erupted in M80, becoming the first nova ever observed in a globular cluster and briefly outshining the entire cluster.
One of Charles Messier's favourites, M62 is remarkable for its noticeably asymmetric shape — the southern side appears more compressed than the northern, likely because the cluster is near the galactic centre and affected by its gravitational tidal forces. M62 contains an unusually high number of millisecond pulsars — collapsed neutron stars spinning hundreds of times per second.
A brilliant young open cluster in the scorpion's tail region, NGC 6231 is dominated by hot, luminous O and B supergiants and is one of the visually richest clusters in the southern Milky Way. It is the core of the Scorpius OB1 stellar association — one of the largest concentrations of massive stars in the galaxy. Despite its brightness, it lies too low from UK latitudes to appreciate; from southern Europe it is a spectacular binocular object.
Scorpius rewards patience and planning. From the UK you need a clear southern horizon, calm summer air, and ideally a location away from city lights to the south. Here is a step-by-step guide to your best chance of a great view.
Choose a clear evening in July or August between 9pm and midnight BST. Look for forecasts showing low humidity and stable air — atmospheric turbulence ("seeing") is worst near the horizon and will blur your view of Scorpius badly. A location with a clear, flat southern horizon — a hilltop, beach, or open field — makes a significant difference.
Face due south and scan just above the horizon. Antares will stand out as the only noticeably orange-red star low in the south. Do not confuse it with Jupiter or Mars, which can appear nearby in the ecliptic; Antares will not move night to night and its colour is distinctly orange-red rather than the steady white of Jupiter or brick-red of Mars.
Point binoculars at Antares and move the view about 1.3° to the west (right as you face south). A fuzzy, round patch of light should appear — this is M4, one of the nearest globular clusters and one of the easiest deep-sky objects to find. In a 150mm telescope at 100× it partly resolves into a sparkling mass of stars.
Trace the scorpion's curved body southward and downward from Antares, following it all the way to the tail region. M7 is naked-eye visible as a bright Milky Way patch near the tip — it is hard to miss. M6 lies a few degrees to its north-west. Both are glorious in binoculars, filling the field with dozens of sparkling stars.
Scorpius points directly towards the galactic centre in Sagittarius. Even without any optical aid, the density of the Milky Way in this region is extraordinary on a dark night — a visible increase in background glow and star density as you scan from Scorpius towards Sagittarius. This is one of the most spectacular naked-eye sky views available from UK latitudes.
Antares dominant in red. Full scorpion outline traceable. M7 cluster visible. Milky Way star clouds.
M4 globular near Antares. M6 Butterfly and M7 Ptolemy clusters. NGC 6231 star fields. Rich Milky Way sweeping.
M4 partly resolved. M80 compact core. Antares double star (at 200mm+). M6 butterfly shape detailed.
From a dark site in southern Europe, Scorpius becomes one of the most rewarding regions of the entire sky. With a 200mm telescope the number of globular clusters, open clusters, and nebulae is almost overwhelming — plan a dedicated session of several hours to explore the full constellation.
The faint blue-white companion to Antares (magnitude 5.4, separation ~2.8 arcseconds) is notoriously difficult — Antares' glare overwhelms it. A 200mm telescope under steady seeing is the minimum. The companion is a hot B-type main sequence star, making the colour contrast with Antares' deep red all the more striking.
Scorpius contains an exceptional concentration of globular clusters — M4, M80, M62, M6, and NGC 6441 (one of the most luminous globulars, hosting an RR Lyrae population) can all be visited in a single session with a 200mm telescope. Compare their different levels of core concentration and resolution.
NGC 6357 (the "War and Peace Nebula") is a vast emission nebula near the tail, containing one of the most luminous star clusters in the Milky Way — Pismis 24. Under dark skies with an OIII or H-alpha filter and a 200mm telescope, the nebula's complex structure becomes visible, though it is primarily an astrophotography target.
A wide-field photograph of Scorpius and Sagittarius captures the very heart of the Milky Way — the densest, most complex region of the sky. With 50–100mm lenses and a tracking mount, dark nebulae (including the Pipe Nebula and Dark Horse), emission nebulae, and countless star clouds make for spectacular images requiring no telescope at all.
Every extra degree of clear southern horizon counts enormously for Scorpius. If you normally observe from a garden with houses blocking the south, even moving to a location with an extra 5° of clear horizon can transform the view. The difference between seeing only Antares and seeing the full scorpion including the stinger stars is just a matter of horizon altitude.