cepheid
A cepheid is a type of star that is very important for astronomers. It's a very small star, and it's very easy to see.
The cepheid is very important because it's a type of star that astronomers can use to measure distances.
A cepheid is a type of star that is very important for astronomers. It's a very small star, and it's very easy to see.
The cepheid is very important because it's a type of star that astronomers can use to measure distances.
noun
A cepheid variable.
adjective
Relating to cepheid variables.