Coma Berenices

Look at the night sky.

One group of stars looks like hair. It is named after a queen.

Long ago, she gave her hair to the gods. This group is in the northern sky. It is between two other groups of stars. You can see it from many lands. The stars are not very bright. One star is like our Sun. It is the brightest one there. This group of stars is very special.

Look up at the northern sky. You might see a group of stars called Coma Berenices.

Its name means "Berenice's Hair" in Latin. It is named after Queen Berenice II of Egypt.

Long ago, the Queen made a promise. She said she would give her hair to the gods. She did this to help her husband return safely from war.

Some stories say the gods put her hair in the sky. This group of stars is the only modern constellation named after a real person.

The stars in this group are not very bright. The brightest star is Beta Comae Berenices. It is a star like our Sun.

Another star is called Alpha Comae Berenices. It is a double star, which means two stars live together.

This area of space is very busy. It holds the Coma Cluster. This is a large group of many galaxies. It also holds a giant galaxy called Malin 1. This galaxy is very hard to see because it is so faint.

Look up at the northern sky to find Coma Berenices.

This group of stars is one of the 88 modern constellations. Its name comes from Latin and means "Berenice's Hair." It sits between the constellations Leo and Boötes. You can see it from both the north and south sides of the Earth. This constellation is very special in astronomy. It is the only modern constellation named after a real person from history.

The story of its name begins with Queen Berenice II of Egypt.

Long ago, the Queen made a vow to the gods. She promised to sacrifice her long hair if her husband, Ptolemy III Euergetes, returned safely from the Third Syrian War. Some stories say she made the sacrifice after he returned home around 245 BC. An astronomer named Conon of Samos helped share this story. He suggested the goddess Aphrodite placed her hair in the sky to honor the Queen. This beautiful idea turned a historical event into a pattern of stars.

Many people have studied these stars for a very long time. Conon of Samos first introduced it to Western astronomy in the third century BC. Later, famous map-makers like Gerardus Mercator and Tycho Brahe helped confirm it as a constellation. Mercator included it on his celestial globes in 1551. Tycho Brahe even listed fourteen stars in it in his 1602 star catalogue. Over the years, more people found more stars. Johannes Hevelius found twenty-one stars, and John Flamsteed found forty-three stars.

The stars in this constellation are not the brightest in the sky. None of them are brighter than a magnitude of 4.2.

The brightest one is Beta Comae Berenices. This star is a main sequence star, which means it is in a stable stage of its life. It is very similar to our own Sun. Another important star is Alpha Comae Berenices, which is also called Diadem. It is a double star, so it is actually two stars living together. These stars form a triangle that looks like flowing hair.

Even though the stars are faint, this area of space is very busy.

It contains the Coma Cluster, which is a huge group of galaxies. It also holds the North Galactic Pole. Scientists have found a very strange galaxy here called Malin 1. This is the first giant galaxy known to be very dim. There is also a special star called FK Comae Berenices. This star is a variable star, which means its brightness changes over time. It even helped scientists discover a new way stars change.

Coma Berenices is an ancient asterism in the northern sky. It is officially defined as one of the 88 modern constellations. This group of stars sits in the fourth galactic quadrant. It is located between the constellations Leo and Boötes. You can see it from both the northern and southern hemispheres.

The name comes from Latin and translates to "Berenice's Hair." This constellation is unique in modern astronomy. It is the only modern constellation named after a specific historic person.

The name honors Queen Berenice II of Egypt. During the Third Syrian War, she made a sacred vow. She promised to sacrifice her long hair as a votive offering. She did this to ensure her husband, Ptolemy III Euergetes, returned safely from battle.

Scholars debate exactly when the sacrifice occurred. Some suggest it happened around May 245 BC after his safe return. The astronomer Conon of Samos and the poet Callimachus presented the asterism to the public. Conon proposed that the goddess Aphrodite placed the hair in the sky. This act served as a divine acknowledgment of the Queen's sacrifice.

Astronomers have studied these stars for many centuries. Conon of Samos introduced the pattern to Western astronomy in the third century BC. Later, the constellation was recognized by Hipparchus and Geminus. It was not included in Ptolemy's famous Almagest, as he viewed it as part of Leo. During the 16th century, the constellation became very popular again. In 1551, Gerardus Mercator included it on a celestial globe.

Mercator used several different names for it. Tycho Brahe also helped establish it as a constellation. He included fourteen stars in his 1602 star catalogue. Later researchers like Johannes Hevelius and John Flamsteed found even more stars. Flamsteed eventually identified forty-three stars in this region.

The constellation is not exceptionally bright to the naked eye. None of its stars exceed a magnitude of 4.2.

The brightest star is Beta Comae Berenices. This is a main sequence star with a magnitude of 4.2. It is a solar analog, meaning it is similar to our Sun. It is about 15% more massive and 10% larger than the Sun. The second brightest star is Alpha Comae Berenices, also called Diadem. It is a double star system located 58.1 light-years away. Gamma Comae Berenices is an orange-hued giant star. It is much larger than the Sun, with a radius about ten times greater. These three stars form a 45-degree isosceles triangle. This shape represents the imaginary tresses of the Queen.

Deep space objects make this constellation a vital area for study. It contains the North Galactic Pole. It also houses the Coma Cluster, which is a massive group of galaxies. This cluster is part of the larger Coma Supercluster.

Scientists have discovered the galaxy Malin 1 here. It is the first known giant low-surface-brightness galaxy. The constellation also hosted the first scientifically observed type II supernova, known as SN 1940B. These features make Coma Berenices a rich field for observing the evolution of the universe.

Many different types of stars exist within these boundaries. There are over 200 known variable stars in this constellation. These are stars that change in brightness over time. One important example is FK Comae Berenices. This star is the prototype for its own class of variable stars. It was also where scientists discovered the "flip-flop phenomenon." The constellation also contains many eclipsing binaries and triple star systems. For example, 12 Comae Berenices is a triple star system. These diverse star types help astronomers understand how stars live and die.

Coma Berenices covers 386.5 square degrees of the sky. This accounts for 0.937% of the total night sky. It is ranked 42nd in size among all constellations. Its boundaries were officially set by Eugène Delporte in 1930. The constellation is visible to anyone north of 56°S latitude. It connects to many different astronomical studies, from meteor showers to galaxy clusters. The Coma Berenicids meteor shower even has its radiant in this area. This shower is known for having very fast meteor speeds. This makes the constellation a central part of the cosmic map.