Only 5% of the known universe is visible to us. The other 95% is called dark matter and dark energy, and it's making scientists rethink what we know about the cosmos. Jet Propulsion Lab’s Fundamental Physics Portfolio Manager John Callas explains what dark energy is, why it’s so hard to study, and what NASA is doing to unlock this big mystery.
- Category
- Success
- Tags
- NASA, Science, dark energy
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