Kaela Polkinghorn sat in the darkened dome theater of Tampa’s Museum of Science and Innovation and watched eight planets huddle cozily around the sun. Pluto was not included in the group hug. The ...
A heartfelt letter written by a 10-year-old has reignited a long-running debate in astronomy, after it caught the attention of Nasa chief, who responded with a simple but encouraging message: "Kaela — ...
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