NASA's TESS Discovers Planetary System's Second Earth-Size World | NASA Wants You to Help Study Planets Around Other Stars
 | The newly discovered planet and its Earth-size sibling are both in the habitable zone, where liquid water could potentially exist on their surfaces. Read More | |  |
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|  | | SLICE OF HISTORY
The lunar lander was sent to explore the Moon's surface to prepare for the Apollo missions.
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