在地质与行星科学（GPS）部门，教职员工和学生研究地球和其他行星，以了解其起源，组成和发展。GPS在一个部门内将地球与行星科学无缝结合在一起，从而提供了独特的视角在我们的世界和我们的宇宙上，它的研究人员有机会将从地球地质学中汲取的教训应用于研究整个太阳系中的其他行星，反之亦然。在地球生物学的选择下，学生可以与生物学或生物学相联系全球定位系统。该协会正式只会影响学生选择哪个课程来满足学院范围的口头陈述要求，所有其他地球生物学选择要求均独立于GPS或生物学联系。但是在实践中，我们希望学生与一个或另一个部门的联
The Geological and Planetary Science (GPS) major is designed to provide its students with a thorough training in the geological and planetary sciences and, whenever possible, to integrate these studies with the core curriculum courses in mathematics, physics, chemistry, and biology that all students take during their first years at Caltech. Students may elect to pursue a specialization track under the GPS major, which include geology, geobiology, geochemistry, geophysics, and planetary science.