This workbook from the Explore series is aimed at elementary school students (grades 1 to 4) and offers an exciting introduction to the topic of planets and stars. The worksheets are ideal for independent work or project activities and allow for flexible, age-appropriate engagement with our solar system and outer space. The materials are structured by difficulty level: worksheets without reading content for grade 1, with minimal reading content for grade 2, and more challenging texts and tasks for grades 3 and 4. Additionally, solutions for self-checking are included to enable students to work independently. The workbook covers numerous fascinating topics, including the sun, the earth, the moon, and the planets of our solar system such as Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, as well as the dwarf planets. Students receive age-appropriate information about stars, constellations, shooting stars, and many of the mysteries of space that have been solved over time. At the same time, the topic of space remains an area where much is yet to be discovered, which should further stimulate the curiosity of students. The photocopiable templates are flexibly applicable and allow for a differentiated approach that meets the varying learning levels of students. Through age-appropriate presentation, students' interest is piqued, and they are motivated to learn more about space and its many puzzles. This workbook provides an ideal foundation for teaching the topic of planets, stars, and the solar system in an exciting and child-friendly way in elementary school. 64 pages, with solutions.