Dan Coe (STScI)
Astronomers recently tapped Einstein's concept of gravitational lensing to determine the weight of a distant star. Watch and learn how this concept came to be and how it works. Subscribe to.
Why Newtons equation of gravity was almost right but not perfect.
In our standard model of cosmology, only five percent of the mass-energy budget of the Universe is accounted for by particles that have been detected in Earth-based laboratories. The remaining.
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