trinary star system

What is a Trinary Star System?


It hardly seems impossible, but researchers have made it a dream come true by configuring a planet in a stable orbit within a triple star system – a trinary star system. 

A trinary star system is a system consisting of three or more stars that appear to be close to one another from the Earth. Usually, this may be as a result of stars being close to one another physically and gravitationally.

In other words, if you observe the stars from the planet Earth, they appear to be close to one another, as they seem to occupy the same point in the sky, but in real life, they are sparsely located from each other. 

In most cases, multiple star systems contain triple star systems, which means more than four components are less likely to occur within the system. 

And surprisingly, this trinary star system is even smaller than star clusters, which contain up to 1,000 stars. However, for significant multiplicities, the number of known systems with given quantities should be able to decrease exponentially upon multiplication. 

Okay, enough of the introduction. Let’s now dig into some of the frequently asked questions about the trinary star systems. Stay in touch for more details. 

Are there any trinary star systems? 

The trinary system can be divided into two distinct classes: hierarchical systems and physical star systems. 

In hierarchical systems, the stars are stable and contained in nested orbits, which means there is not much interaction, so each hierarchical level is treated as a Two-body problem. This results from unstable interaction between the realms and the motion of stars that continue to stabilize with time. 

These systems consist of more than three stars. These can be divided further into smaller subgroups that are hierarchical themselves.   

Meanwhile, in a physical triple star system, the star orbits in a trinary star system orbits. Usually, you’ll observe two of the stars form a close binary system with the third one orbiting a bit far from the binary realm. 

The main reason behind this phenomenon is the comparable sizes between the inner and outer orbits, leading to the ejection of a star from the system.

However, not all triple star systems are gravitationally-bound, and such include a physical binary star and a purely optical triple star system.   

What star system do we live in? 

Let’s face it. Most people are continuously demented when asked such a question – simply because they fail to understand how possible it is to live in a star.

Well, we live on the planet Earth, which is the most significant part of the solar system. But here is the big question: where is the solar system located? 

The solar system is a small part of the Milky Way Galaxy. A galaxy is an enormous collection of dust, gas, and billions of stars within the solar system. Interestingly, this galaxy has a supermassive black hole in the middle, held together by gravity. 

Earth is a Single star system

To observe all these practices, watch the sky at night, and you’ll surely see stars in the Milky Way. If the sky is exceptionally dark away from street lights, you can as well observe patches of the Milky Way across the sky.  

What star system has the most stars? 

Thanks to the planets in our solar system where we have only one star that orbits the sun. However, there are other distant planets known as exoplanets. 

Such planets are known to be found in families with several stars. In the meantime, scientists have been able to come up with complex influences of trinary star systems – a planet with three or more parents.    

These discoveries were made using more advanced instruments, which are fitted to telescopes at the Palomar Observatory in San Diego. For example, the Robo-AO adaptive optics system developed by the Inter-University Center for Astronomy and Astrophysics in India.

For many years now, the planet has been known to be a quadruple star system, consisting of only three stars. However, things have recently changed: in the year 2013. The first four-star planet, KIC 4862625, was discovered by citizen scientists with the help of public data from NASA’s Kepler mission. 

Besides, the latest discoveries suggested that quadruple star systems are likely to be rarer than thought earlier.  Recent research has proven this type of star system, to contain two pairs of twin stars, which are circling each other at great distances slowly. 

There has been a drastic improvement in the observational techniques from the previous estimates. This has proven our solar system to contain about four percent of the quadruple stars.   

What cluster is Earth in? 

The planet Earth is found in the Virgo Supercluster of galaxies. A supercluster is an assemblage of galaxies held together by gravity.

The planet earth is a subgroup of galaxies known as the Local Group, which is the second-largest among all the universes.

Within the Local Group, there is the Milky Way – a large spiral galaxy where the Earth is located.

The Milky Way covers about two-thirds of the way out from the center of the universe, including the several comets and asteroids and dwarf planets surrounding the sun.

What’s more, the Earth is the third planet in the Solar System. 

Solar System

The Solar System is a gravitationally bound system of the sun and other objects that surrounds the orbit directly or indirectly.

The objects directly orbiting the sun include the most massive eight planets. The rest being small Solar System, the dwarf planets, and the smaller objects. 

Meanwhile, those that orbit the sun indirectly include the moons, where two of them are more significant than the smallest planet, Mercury.


The universe is one of the most beautiful places to be: the stars, moons, planets, and the solar system you name it!

With all these supernatural features within our universe, what reasons do we have of not appreciating it?

The trinary star system is one of them. A system that consists of more than three stars, where stars appear jointly to each other from the Earth’s surface. Have you observed it yet?

Give it a try even now by observing the sky during the night hours for clarity. If you have any other new tips, we’ll be glad if you leave a comment. Remember, two hands are better than one. 

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