Celestial names tend to feel both ancient and modern at once. Stella is Latin for star and has been in steady use for centuries. Luna, the Latin moon, has had a recent surge. Aster, Esther and Sidra all share the star root from different traditions.
Sun and moon
Sun names tend to feel bright and confident (Helena from the Greek sun, Aelius). Moon names feel softer and more reflective (Luna, Selena). Star names sit between the two.