Do you want to know what are stars and how are they formed? Stars are huge celestial bodies made of hydrogen and helium gas.
The process of nuclear fusion takes place in their center. In which the element hydrogen is converted into helium. The stars get their energy from this process.
The closest star to Earth is our own Sun. It is so big that it can accommodate 13 lakh earths.
Going beyond this, the second nearest star is Proxima Centauri. Which is located at a distance of about 4 light years from us.
Similarly, there are many stars scattered in the universe. There are estimated to be 200 billion stars in our galaxy alone.
The atmosphere consists of several moving layers of air. These layers keep changing the path of the light of the stars. As a result of this, their light sometimes disappears from our sight, sometimes it keeps on appearing. That's why the stars appear twinkling.
UY Scuti is the largest star in the universe. UY Scuti is an extremely red hypergiant or red supergiant star. UY Scuti is the largest known star by radius. It has an estimated radius of 1,708 solar radii (1.188×10^9 kilometres).
It is about 29 kilo parsecs (9,500 light-years) away from our Earth. UY Scuti is located a few degrees north of the A-type star Gamma Scuti and northeast of the Eagle Nebula.
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The star UY Scuti is very bright, ranking it 9th among its brightest stars when viewed from Earth.