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The smallest planetary science missions, with budgets of less than $100 million, have a lousy track record.—Stephen Clark, ArsTechnica, 19 May 2026 Despite the proximity, the space rock poses no danger, according to Richard Binzel, a professor of planetary sciences at the Massachusetts Institute of Technology and the inventor of the Torino Scale, a tool for categorizing potential collisions of space objects with Earth.—Jacopo Prisco, CNN Money, 18 May 2026 In planetary science, that means the object had already separated into layers, with a dense metallic core surrounded by lighter outer material — similar to how Earth has a core and mantle.—Rupendra Brahambhatt, Interesting Engineering, 9 May 2026 Elkins-Tanton is a professor of planetary science at Arizona State University and the Psyche mission’s principal investigator.—K. R. Callaway, Scientific American, 9 May 2026 See All Example Sentences for planetary science