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Why is the number of galaxies in the Local Group uncertain
Insects
A group of arthropods distinguished by having a body divided into three sections (head, thorax, abdomen), three sets of legs, complex eyes, and a single pair of antennae.
Invertebrates
Animals without a backbone, comprising a diverse group including insects, mollusks, and arachnids.
Vertebrates
Animals that have a backbone or spinal column, including fishes, amphibians, reptiles, birds, and mammals.
Filter
A device or process that removes impurities or separates particles from a liquid or gas.
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