0/PDMCreative Commons Public Domain Mark 1.0falsefalse English PercivalLowellobservingVenus through the Alvan Clark & Sons refracting telescope. Russian Персиваль
indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike
indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike