A mass may pertain-to a spacecraft.Logical formLearned from23 sentences. A spacecraft can be successful.Logical formLearned from23 sentences. Engines may pertain-to a spacecraft.Logical formLearned from23 sentences. A spacecraft can be solar.Logical formLearned from23 sentences. A velocity may pertain-to a spacecraft.Logical formLearned from23 sentences. A spacecraft may orbit a planet.Logical formLearned from23 sentences. A condition may pertain-to a spacecraft.Logical formLearned from23 sentences. A signal can be from a spacecraft.Logical formLearned from23 sentences. Thrusters may pertain-to a spacecraft.Logical formLearned from23 sentences. A window may be built into a spacecraft.Logical formLearned from23 sentences. A name may pertain-to a spacecraft.Logical formLearned from23 sentences. Observations can be by a spacecraft.Logical formLearned from22 sentences. A distance can be between a spacecraft.Logical formLearned from22 sentences. A spacecraft can be kilometers.Logical formLearned from22 sentences. An instrument can be on a spacecraft.Logical formLearned from22 sentences.