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Loading contentThe most-recommended first instrument in astronomy — wide-field, portable, and forgiving. A modest pair shows the craters of the Moon, the moons of Jupiter, star clusters, and the brighter galaxies and nebulae, and teaches the sky better than any telescope rushed into too soon.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.