The Great Diamond of Spring, a striking asterism in May’s night sky, appears as a near-perfect diamond shape formed by four exceptionally bright stars. This celestial pattern serves as a guide to a densely packed region of galaxies, making it a favorite target for amateur astronomers. The diamond’s formation spans nearly 50 degrees of the sky, offering a wide field of view for stargazers equipped with binoculars or small telescopes.

What is the Great Diamond of Spring?

The Great Diamond of Spring is an asterism, a recognizable pattern of stars that is not an official constellation. It is formed by four luminous stars: Arcturus in Bootes, Spica in Virgo, Denebola in Leo, and Cor Caroli in Canes Venatici. These stars create a near-rectangular shape that stands out even in moderately light-polluted skies.

The asterism’s name reflects its seasonal appearance and diamond-like geometry. It rises in the east after sunset in late spring and remains visible through early summer. Astronomers often use the Great Diamond as a starting point for deep-sky observations, as it points directly to a cluster of galaxies known as the Virgo Cluster, located approximately 54 million light-years away.

How to find the Great Diamond

To locate the Great Diamond, start by identifying Arcturus, the fourth-brightest star in the night sky, visible as a bright orange point high in the southeastern sky after dark. Follow a curved line from the handle of the Big Dipper to reach Arcturus, a method known as “arc to Arcturus.” From Arcturus, move southeast to Spica, the brightest star in Virgo, which appears blue-white.

Next, trace a line southwest to Denebola, the tail of Leo, and then northeast to Cor Caroli, a fainter but distinct star in Canes Venatici. Together, these four stars outline the diamond shape. The pattern is most visible under dark skies with minimal light pollution, though its brightest stars can often be spotted even in urban areas.

Galaxies within reach of the Great Diamond

The Great Diamond serves as a celestial signpost to some of the most impressive galaxy clusters in the spring sky. The most notable is the Virgo Cluster, home to over 1,300 galaxies, including Messier 87, famous for its supermassive black hole imaged in 2019. Amateur astronomers with 8x42 binoculars or a small telescope can spot several members of the cluster, including Messier 49 and Messier 86.

Other galaxies within the diamond’s boundaries include those in the Leo Triplet, a small group of interacting galaxies about 35 million light-years away. These include Messier 65, Messier 66, and NGC 3628. Observers with larger telescopes may also detect faint galaxies in Coma Berenices, another constellation near the diamond’s eastern edge.

Best viewing conditions and timing

The Great Diamond is most visible in May, when it reaches its highest point in the sky around midnight local time. To maximize your view, observe from a dark location away from city lights, ideally during the new moon phase when moonlight does not interfere. Allow your eyes at least 20 minutes to adjust to the darkness for optimal stargazing.

Use a star chart or astronomy app to confirm the positions of the four stars and the galaxies they point to. No special equipment is required to see the diamond itself, but a telescope or binoculars will reveal the fainter galaxies within the pattern. The diamond will remain visible through early summer, though its position will shift westward nightly.

The Great Diamond of Spring offers more than just a striking visual—it’s a gateway to the distant universe. By learning its stars and the galaxies they guide you to, you connect with a region of space teeming with cosmic history. Whether you’re a seasoned astronomer or a casual observer, this seasonal pattern provides a memorable introduction to the wonders of the spring sky.

What You Need to Know

  • Source: Space.com
  • Published: May 15, 2026 at 12:00 UTC
  • Category: Science
  • Topics: #space · #astronomy · #nasa · #here · #look · #great-diamond

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Curated by GlobalBR News · May 15, 2026

🇧🇷 Resumo em Português

Pela primeira vez em décadas, os brasileiros terão a chance de contemplar um dos espetáculos celestes mais impressionantes da primavera: o Grande Diamante de Primavera, um padrão estelar formado por quatro estrelas brilhantes que dominará o céu noturno de maio. Visível a olho nu mesmo em grandes cidades, essa formação astronômica oferece não só um show visual, mas também a oportunidade de observar galáxias dentro dela, transformando uma simples noite de outono em uma verdadeira aula de astronomia ao ar livre.

O fenômeno é especialmente relevante para o Brasil porque, no hemisfério sul, a primavera começa em setembro, mas o Grande Diamante de Primavera ainda pode ser visto logo após o pôr do sol em maio, oferecendo uma conexão única com o céu do hemisfério norte. Além disso, sua observação não requer equipamentos sofisticados, democratizando o acesso ao conhecimento astronômico em um país onde a poluição luminosa ainda é um desafio para entusiastas. Para os leitores de língua portuguesa, é uma chance de explorar constelações como a de Boötes e Virgem, que abrigam galáxias fascinantes, como a M87, famosa pela primeira imagem de um buraco negro capturada pela humanidade.

Se você perder a oportunidade agora, só poderá ver o Grande Diamante de Primavera novamente em setembro, quando ele retornará ao céu noturno — então, anote na agenda: maio é a hora de olhar para cima.

🇪🇸 Resumen en Español

El cielo nocturno de mayo regala un espectáculo estelar con la aparición del Gran Diamante de Primavera, una formación celestial que cautiva a astrónomos y aficionados por igual. Cuatro estrellas brillantes configuran esta figura geométrica, visible incluso en zonas con cierta contaminación lumínica, siempre que se sepa dónde mirar.

Este patrón estelar, que incluye a Arturo, Spica y Denébola entre sus vértices, no solo ofrece un espectáculo visual, sino que también sirve como guía para localizar galaxias y otros objetos celestes en una de las regiones más ricas del firmamento primaveral. Para los hispanohablantes, conocer esta constelación puede ser especialmente útil, ya que su observación no requiere equipos profesionales: basta con alejarse de las luces urbanas y dirigir la mirada hacia el este al anochecer, aprovechando que el fenómeno se extiende durante varias semanas.