A star begins its life in a dense molecular cloud called a nebula. Shown here is the Horsehead Nebula.
There are two different star sizes. One is a dwarf star the other one is giant. The dwarf is about 435,000 miles around. That is a small star but that is mighty big.
In 1995 a brown dwarf star was found. A brown dwarf star is not really a star; it is a failed star. A failed is a star that has gong out.
The nearest red dwarf star is 20 trillion miles away. Red dwarf stars grow and grow until they burn up then all that’s left is a hot core known as a white dwarf star.
When a white dwarf star goes out it is then a black dwarf star. No one has ever seen a black dwarf star.