Astronomers have witnessed formation of an enormous star, dubbed as W75N(B)-VLA 2, over the time span of 18 years.

The astronomers, with the help of National Science Foundation's Karl G. Jansky Very Large Array, (VLA) conducted a study of a massive young star that was around 4200 light-years from Earth. The team of astronomers compared a picture made in 2014 with a previous VLA image from the year 1996.

The pair of pictures of a young star, which was made 18 years apart, has unveiled a dramatic difference, which is providing astronomers a unique, "real-time' look at how huge stars develop in the initial phases of their formation.

According to the scientists, the young star was getting formed in a thick, gaseous environment, and was enclosed by a doughnut-shaped, dusty torus.

The star had incidents in which it ejected an ionized, hot wind for many years. In the beginning the wind can expand in all directions and hence develops a spherical shell around the star.

Afterwards, the wind hits the dusty torus that slows it. The wind expanding outward along the poles of the torus, where there was less obstruction, moves more swiftly that causes an elongated shape for the outflow.

W75N(B)-VLA 2 was assessed to be about 8 times more enormous as compared to the Sun. The more even outflows are witnessed in huge young stars in the first few thousand years of their lives, the phase at which W75N(B)-VLA 2 was believed to be.