A huge group of stars is in space.
It is very, very big. It holds many bright dots. These dots are far away. It helps us learn about space. Do you like to look at the stars?
Space has very big things in it.
One is called the BOSS Great Wall. It is a huge group of stars. This group is very wide. It is almost one billion light years across.
It has at least 830 bright stars we can see. Many other stars are there too. They are just hard to see. This group is much heavier than our own galaxy. Scientists use it to learn about space. It helps them see how the universe is built.
Space holds very big things. One is the BOSS Great Wall.
It is a huge group of many galaxy clusters. A cluster is a group of galaxies. This group is about one billion light years wide. It is one of the largest things in space.
The wall has many parts. It has two long walls of galaxies. It also has two large clusters. It has several smaller clusters too. Scientists see at least 830 bright galaxies there. Many more galaxies are there but are dark. They are hard to see.
This group is very heavy. It is 10,000 times the mass of our Milky Way. A mass is how much stuff is in something. Experts found it in early 2016. They used a study called BOSS. They looked at how the light from galaxies moves. This helped them find the shape. They also used math to check its size. Some people still debate if it is one single structure. They wonder if it moves together. Or does the growing universe pull it apart? This helps us learn about the cosmic web. The cosmic web is the pattern of space.
Space contains some truly huge things. One of these is the BOSS Great Wall.
It is a massive group of many galaxy clusters. A cluster is a large group of galaxies. This group is a supercluster complex. It is one of the largest things we can see in the universe. This discovery helps us learn about the cosmic web. The cosmic web is the giant pattern of space.
This structure works by grouping many things together. It has two long walls made of galaxies. These are called elongated superclusters. It also has two large superclusters. There are several smaller clusters too. We can see at least 830 bright galaxies there. Many other galaxies are also there. These are called dark galaxies because they are not visible.
A research team found this in early 2016. They used a study called BOSS. This stands for the Baryon Oscillation Spectroscopic Survey. They also used the Sloan Digital Sky Survey. Many people worked on this team. These names include Heidi Lietzen and Elmo Tempel. Other researchers were Lauri Juhan Liivamägi and Antonio Montero-Dorta. Maret Einasto and Alina Streblyanska also helped. Claudia Maraston and Jose Alberto Rubiño-Martín were on the team. Enn Saar was part of the group too.
The BOSS Great Wall is very big. It is about 1 billion light years wide. Its total mass is huge. It is 10,000 times the mass of our Milky Way galaxy. One long wall is 186/h Mpc wide. The second wall is 173/h Mpc wide. Other clusters are 91/h Mpc and 64/h Mpc wide. Scientists used math to check the shape. They used things called Minkowski functionals. These helped them find the width and length. They also found the curvature.
Astronomers still talk about this wall today. They debate if it is one single structure. They look at its complex shape. They also look at its size. One big question is how it moves. Does the group move together? Or does the expanding universe pull it apart? This wall is different from the Sloan Great Wall. Its clusters are much richer. They have more dense galaxies. These galaxies have high stellar mass.
The BOSS Great Wall is a massive supercluster complex. It is one of the largest superstructures in the observable universe. A supercluster is a large group of galaxy clusters. This complex is part of the cosmic web. The cosmic web is the large-scale pattern of the universe.
Understanding these structures helps astronomers study how the universe is organized. It shows us how galaxies group together over vast distances.
This superstructure is made of several distinct parts. It contains two elongated superclusters that form galaxy walls. The first wall is known as supercluster A. It has a diameter of 186/h Mpc. The second wall is supercluster B. Its diameter is 173/h Mpc. There are also two moderately large superclusters. These are named supercluster C and supercluster D. Supercluster D has a diameter of 91/h Mpc. Supercluster C has a diameter of 64/h Mpc. Several smaller superclusters also exist within the complex.
Scientists used specific tools to study this structure. They used Minkowski functionals to verify its shape and size. These mathematical tools measure different properties of a shape. The first three functionals quantify thickness, width, and length. The fourth functional determines the overall curvature of the structure.
This allowed the team to understand the complex geometry of the wall. They could see how the different parts curved through space.
A research team discovered the BOSS Great Wall in early 2016. They used the Baryon Oscillation Spectroscopic Survey, or BOSS. This was part of the Sloan Digital Sky Survey (SDSS). The team included many researchers from several institutions. The members were Heidi Lietzen and Elmo Tempel. They also included Lauri Juhan Liivamägi and Antonio Montero-Dorta. Maret Einasto and Alina Streblyanska were part of the group. Claudia Maraston, Jose Alberto Rubiño-Martín, and Enn Saar also worked on the discovery.
The scale of the BOSS Great Wall is truly enormous. It is roughly 1 billion light years in diameter. The complex has a mean redshift of z ~ 0.47. This measurement relates to its distance from us. In terms of Hubble length, this is about 6.8 billion light years. The total mass is approximately 10,000 times the mass of the Milky Way galaxy.
This makes it a very heavy and significant part of the universe.
We can see many different types of objects inside this wall. The structure contains at least 830 visible galaxies. However, there are many more that we cannot see. These are called dark galaxies. To find the scale of the wall, the team compared luminosities. They also looked at stellar masses within the superstructure. They used data from the SDSS 7th data release, known as DR7. They compared these to known high stellar mass galaxies. This helped them determine the overall morphology, or shape, of the wall.
Astronomers are still debating the nature of the BOSS Great Wall. Some wonder if it should even be called a single structure. This is due to its massive size and complex shape. A major part of the debate involves motion. Scientists want to know if the superclusters move together. Or, is the expanding universe slowly pulling them apart?
This question is vital for understanding how large structures behave over time.
The BOSS Great Wall is unique when compared to other structures. For example, it differs from the Sloan Great Wall. The superclusters in the BOSS Great Wall are much richer. They contain more dense galaxies. These galaxies also have high stellar mass. This discovery provides valuable data for astronomers. It helps them learn more about the large-scale structure of the cosmos.
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