There's a bit of a misunderstanding here. The terms "morning star" and "evening star" don't refer to planets having their own stars. Instead, they are names given to planets that are visible in the sky at certain times of day.

Here's the breakdown:

* Morning Star: This is most often used to describe the planet Venus when it appears in the eastern sky before sunrise. Its brilliant white glow makes it easily noticeable.

* Evening Star: This also refers to Venus, but when it appears in the western sky after sunset. It can be just as bright as it is in the morning.

While other planets like Mars, Jupiter, and Saturn can also appear in the morning or evening sky, Venus is the most commonly referred to as the "Morning Star" and "Evening Star" due to its extreme brightness and visibility.