Green star discovered

A star known as WD J1330+6435, located about 284 light-years from Earth, has been identified as the first star that researchers claim appears green when observed.

Color of stars and temperature

Typically, a star's color is related to its temperature. Cooler stars appear orange, stars like our Sun appear white, and hotter stars appear pale blue. This relationship was thought to apply to all stars, including white dwarfs.

White dwarfs and their color

White dwarfs, which are the remnants of stars, were believed to be white. However, recent research by Mark Hollands and colleagues from the University of Warwick has shown that they can appear in various colors, including yellow, pink, and violet.

Chemical composition and color

The color of a star, especially a white dwarf, is also influenced by its chemical composition and density. High density causes elements like calcium, carbon, and sodium to interact with the surrounding helium layer, absorbing light across a wide range of colors.

Specifics of WD J1330+6435

For WD J1330+6435, sodium in its atmosphere absorbs the orange part of the spectrum, resulting in a green glow. Mark Hollands, who led the research, noted this finding in an article published by Sky Nightly.

Other notable white dwarf

In addition, WD J1011+2845, located 48 light-years from Earth, has been identified as the reddest star ever found. However, it is important to note that most white dwarfs are indeed white in color.