Gomeisa, also known as Beta Canis Minoris, is a star in the constellation Canis Minor. While we can't directly sample the star's composition, we can analyze its light to determine its elemental makeup.

Based on spectral analysis, Gomeisa is known to contain:

* Hydrogen (H) - The most abundant element in the universe, including stars.

* Helium (He) - The second most abundant element.

* Other elements - In smaller amounts, Gomeisa likely contains many other elements, such as:

* Carbon (C)

* Nitrogen (N)

* Oxygen (O)

* Neon (Ne)

* Magnesium (Mg)

* Silicon (Si)

* Iron (Fe)

* And many more.

The exact proportions of each element in Gomeisa are still being researched. However, the general principle is that stars are primarily composed of hydrogen and helium, with smaller amounts of heavier elements formed through nuclear fusion in their cores.