Isadora Moon And The Shooting Star by Harriet Muncaster

Isadora is looking at the night sky when she sees a falling star and is amazed when she discovers the star is a Glow Sprite, called Nova! She needs Isadora's help to find her lost kitten Nova and get back to her own planet. Luckily, Isadora and her out-of-this-world family are on hand to help!