What is star Sirius made of?

Answer 1

Like other stars, Sirius formed when a cloud of gas and dust called a nebula collapsed under the force of gravity. As the cloud collapsed it formed two masses that heated up until the nuclear fusion of hydrogen ignited, turning the two masses into stars by 200 to 300 million years ago. The result was a binary star system consisting of the smaller Sirius A and the larger Sirius B. Since Sirius B was more massive it burned through its hydrogen fuel more quickly and eventually exhausted its fuel supply. By about 120 million years ago it has shed most of its mass while the remainder collapsed into a small, dense remnant called a white dwarf, leaving Sirius A as the larger, more massive body. Sirius A has not yet finished its fuel supply and will likely last for about another 1.5 billion years or so.

Answer 2

They looked threw a f0cking telescope and saw a dam star was moving

Answer 3

Sirius is actually two stars. Sirius A is mostly hydrogen and helium. Sirius B is mostly carbon and oxygen in a highly compressed, degenerate state.