An observatory can be for gravitational waves.Logical formLearned from4 sentences. A gravitational force can be proportional to a square of a distance.Logical formLearned from4 sentences. Gravitational waves may undergo an evolution.Logical formLearned from4 sentences. An object can be gravitational.Logical formLearned from4 sentences. A self-force can be gravitational.Logical formLearned from4 sentences. A displacement can be gravitational.Logical formLearned from4 sentences. Effects may pertain-to gravitational forces.Logical formLearned from4 sentences. Gravitational physics can be theoretical.Logical formLearned from4 sentences. A free-fall can be gravitational.Logical formLearned from4 sentences. An aether can be gravitational.Logical formLearned from4 sentences. A redistribution can be gravitational.Logical formLearned from4 sentences. Waves can be constituted-of-or-filled-with gravitational radiation.Logical formLearned from4 sentences. Forcings can be gravitational.Logical formLearned from4 sentences. An (acceleration vector) can be gravitational.Logical formLearned from4 sentences. A shield can be gravitational.Logical formLearned from4 sentences.