A gravitational energy may pertain-to a black hole.Logical formLearned from5 sentences. A stresses can be gravitational.Logical formLearned from5 sentences. A gravitational force can be strong.Logical formLearned from5 sentences. A gravitational force can be weak.Logical formLearned from5 sentences. A loss can be gravitational.Logical formLearned from5 sentences. A background can be constituted-of-or-filled-with gravitational waves.Logical formLearned from5 sentences. A gravitational pull can be strong.Logical formLearned from5 sentences. Gravitational radiation can be from objects.Logical formLearned from5 sentences. A gravitational radiation can be periodic.Logical formLearned from5 sentences. A gravitational force may manifest weakness.Logical formLearned from5 sentences. Gravitational waves may be observed.Logical formLearned from5 sentences. Gravitational waves can be ripples.Logical formLearned from5 sentences. An observatory can be gravitational.Logical formLearned from5 sentences. Bursts can be constituted-of-or-filled-with gravitational waves.Logical formLearned from5 sentences. Gravitational interactions can be between planets.Logical formLearned from5 sentences.