✦ ASK THE ATLAS ✦
The universe is listening
One mind over 119,625 stars · 6,372 worlds · 361 deep studies · tonight’s computed sky
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Why isn’t Pluto a planet?
Could humans live on Europa?
What is the biggest star?
What planets are visible tonight?
When is the next meteor shower?
How the Oracle works
No mysticism under the hood. Something better: your question is answered ONLY from this site’s own data (the star catalog, the exoplanet archive, the deep guides, tonight’s computed sky, the launch schedule), with strict instructions to admit what it doesn’t know. Every answer links to the pages it drew from, so you can verify everything. Rate-limited per visitor; not a general chatbot.
Worked examples
Q: Why isn’t Pluto a planet?
A: In 2006 the IAU set three tests: orbit the Sun, be round, and have cleared your orbital lane. Pluto passes two but shares the Kuiper Belt with countless neighbors, so it became a “dwarf planet.” Nothing about Pluto changed, only our filing system. See the full story on the Pluto page.
A: In 2006 the IAU set three tests: orbit the Sun, be round, and have cleared your orbital lane. Pluto passes two but shares the Kuiper Belt with countless neighbors, so it became a “dwarf planet.” Nothing about Pluto changed, only our filing system. See the full story on the Pluto page.
Q: Could life exist on Enceladus?
A: No life has been found. But Cassini measured liquid water, organic molecules, phosphorus and a chemical energy source in its plumes: every ingredient on the checklist, rated “highly interesting to scientists” in the Atlas. A dedicated life-detection mission is the missing step.
A: No life has been found. But Cassini measured liquid water, organic molecules, phosphorus and a chemical energy source in its plumes: every ingredient on the checklist, rated “highly interesting to scientists” in the Atlas. A dedicated life-detection mission is the missing step.
Answers are AI-generated from the Atlas’s cached data and clearly bounded by it. Verify anything important on the linked pages and their primary sources.