Private Lives | Compare and Contrast
1930: Astronomers at the Lowell Observatory in Flagstaff, Arizona, discover a ninth planet in the solar system and name it Pluto. It is the first "new" planet since Neptune was sighted in 1846. The discovery is made with mankind's most-advanced tool for space exploration: a telescope.
Today: Humans have walked on the moon, first landing m 1969. Unmanned spacecraft have explored the outer reaches of the solar system, mapping the surfaces of planets known only as points of light in 1930. The satellite-mounted Hubbell telescope was launched into space in the mid-1990s,...
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