资讯
On this day in space! Aug. 17, 1877: Asaph Hall Discovers the Martian moon Phobos
📌 概要
On this day in space, Aug. 17, 1877: American astronomer Asaph Hall discovered Mars's moon Phobos.
On this day in space, Aug. 17, 1877: American astronomer Asaph Hall discovered Mars's moon Phobos.