A dark-matter halo can be mysterious.Logical formLearned from2 sentences. A dark-matter halo can be invisible.Logical formLearned from2 sentences. Dark-matter haloes may be trapped.Logical formLearned from2 sentences. A galaxy may be surrounded by a dark-matter halo.Logical formLearned from2 sentences. A person may paint a halo.Logical formLearned from2 sentences. A halo can be constituted-of-or-filled-with virtue.Logical formLearned from2 sentences. A halo can be ominous.Logical formLearned from2 sentences. Developers can be constituted-of-or-filled-with halo.Logical formLearned from2 sentences. An extent may pertain-to haloes.Logical formLearned from2 sentences. A halo of x-rays may be detected.Logical formLearned from2 sentences. Sizes of galaxies may match hand-in-glove to a fraction of sizes of dark-matter haloes.Logical formLearned from2 sentences. Haloes can be due to infall of matter.Logical formLearned from2 sentences. (Spiral galaxies) may be immersed in haloes of gas.Logical formLearned from2 sentences. A (x-ray emitting halo) can be hot.Logical formLearned from2 sentences. A galaxy can be into a halo.Logical formLearned from2 sentences.