12 Smallest Stars In The Universe!

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Published on October 15, 2020 1:30:03 PM ● Video Link: https://www.youtube.com/watch?v=9fFiGg61x5Q

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The Smallest Stars In The Universe
The massive stars in the universe are either red hypergiants or red supergiants; in extreme cases, they are more than 1,500 times bigger than the Sun. But what about the smallest stars? Are there stars smaller than our Sun? Curious to know the smallest stars ever discovered?? Keep Watching!!
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ere's the exciting list of some of the smallest stars in the universe:

1- CM Draconis A which is an eclipsing binary system approximately 47 light-years away in the constellation of Draco (the Dragon). The system consists of two nearly identical red dwarf stars located in the constellation Draco. The two stars orbit each other with a period of 1.27 days with a separation of 2.7 million kilometres (0.018 AU). Along with two stars in the triple system KOI 126, the stars in CM Draconis are the lightest stars with precisely measured masses and radii. Consequently, the system plays an important role in testing stellar structure models for very low mass stars. These comparisons find that models underpredict the stellar radii by approximately 5%. This is attributed to consequences of the stars' strong magnetic activity. According to the system's entry in the Combined General Catalogue of Variable Stars, at least one of the components is a flare star and at least one is a BY Draconis variable. CM Draconis A has a mass of about 0.2310 the solar mass and a radius of about 0.2534 the solar radius.

2- Ross 154 which is a star in the southern zodiac constellation of Sagittarius. It has an apparent visual magnitude of 10.44, making it much too faint to be seen with the naked eye. The distance to this star can be estimated from parallax measurements, which places it at 9.69 light-years (2.97 parsecs) away from Earth. It is the nearest star in the southern constellation Sagittarius, and one of the nearest stars to the Sun. Moreover, It is a red dwarf, meaning it’s producing energy by burning hydrogen in its core. Compared to the Sun, Ross 154 has only 17% of its mass and about 24% of its radius. Ross 154 has a mass of about 0.17 the solar mass and a radius of about 0.24 the solar radius and Due to its relatively higher rotational speed, astronomers believe that it might be younger than the Sun. In about 157,000 years or so, this star will make its closest approach to the Sun at 6.39 light years.

3- CM Draconis B which is the second red dwarf in the CM Draconis star system mentioned above. It is slightly less massive and has a smaller radius than CM Draconis A. It is also cooler than its companion. CM Draconis B has a mass of about 0.2141 the solar mass and a radius of about 0.2396 the solar radius.

4- Barnard’s Star which is a red dwarf about six light-years away from Earth in the constellation of Ophiuchus. It is the fourth-nearest-known individual star to the Sun after the three components of the Alpha Centauri system, and the closest star in the northern celestial hemisphere. Its stellar mass is about 14% of the Sun's. Despite its proximity, the star has a dim apparent magnitude of +9.5 and is invisible to the unaided eye; it is much brighter in the infrared than in visible light. Barnard's Star is among the most studied red dwarfs because of its proximity and favorable location for observation near the celestial equator.

5- Ross 248 which is a small star approximately 10.30 light-years (3.16 parsecs) from Earth in the northern constellation of Andromeda. Within the next 80,000 years, Ross 248 is predicted to be the nearest star to the Sun for a brief time, overtaking the current nearest star and triple system, Alpha Centauri.
6- Wolf 359 which is a red dwarf star located in the constellation Leo, near the ecliptic. At a distance of approximately 7.9 light years from Earth, it has an apparent magnitude of 13.54 and can only be seen with a large telescope.

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