Short answer is no. Long answer is yes with a 'but'.
In all the time we have been looking up at the stars we have never seen a green star. The reasoning behind it was because a star's colour is determined by its heat intensity. Cooler stars burn in the red to yellow range while hotter stars burn in the white to blue range. So why did scientists detect a "green star? The star was the size of a white dwarf star. It was in fact a white dwarf. But there were massive rocks in its solar system that were crashing into it. These rocks contained elements, like calcium, that blocked some of the light spectrum giving the star a greenish hue in appearance.
So, while the star itself does not emit visible green light, the remnants of its solar system crashing into it is making the white dwarf star appear green.
In all the time we have been looking up at the stars we have never seen a green star. The reasoning behind it was because a star's colour is determined by its heat intensity. Cooler stars burn in the red to yellow range while hotter stars burn in the white to blue range. So why did scientists detect a "green star? The star was the size of a white dwarf star. It was in fact a white dwarf. But there were massive rocks in its solar system that were crashing into it. These rocks contained elements, like calcium, that blocked some of the light spectrum giving the star a greenish hue in appearance.
So, while the star itself does not emit visible green light, the remnants of its solar system crashing into it is making the white dwarf star appear green.
