Firefly & Fern

Helen Orme, David Orme

Ages 4–8space explorationastronomy

Fran Howard

Ages 6–10space explorationplanets

Nadia Higgins

Ages 7–12space explorationastronomy

Ellen Jackson

Ages 6–10space explorationastronomy

Gregory L Vogt

Ages 7–12astronomyspace exploration

Lynn M. Stone

Ages 5–9astronomyspace exploration

Ray Spangenburg, Kit Moser

Ages 9–12astronomyspace exploration

Spangenburg, Ray, Ray Spangenburg, Kit Moser, Diane Moser

Ages 8–14astronomyspace exploration

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