Why do we care so much that Pluto isn't a planet? Twenty years after Pluto became a dwarf planet, people are still fighting over its status. Experts explain why the debate feels so personal. Space · Aug 24
In 1776, the solar system only had 6 planets. Now, it has 8. Does it end there? As the United States prepares to celebrate its 250th anniversary, the history of the solar system tells its own story of exploration. Space · Jul 1
Why is the idea of a Blue Moon so enchanting? What is it about the Blue Moon that inspires us to write songs and name beers after it? Space · May 30
2 seconds that changed the world: Robert Goddard launched the 1st liquid-fueled rocket 100 years ago today Robert Goddard's innovations in liquid-fueled rockets — assisted by his wife, Esther — still resonate 100 years after his pioneering flight. Space · Mar 16
Is Pluto a planet or not? Who cares! Our love for the King of the Kuiper Belt is stronger than ever 95 years later On the 95th anniversary of its discovery, Pluto remains one of the most beloved and enigmatic worlds in our solar system, whether you call it a planet or not. Space · Feb 18, 2025