A new model defines an upper limit to planetary radiation belt intensity

We all know that stars radiate light and much more. But radiation belts can also surround many other celestial bodies, such ...
Inverse

The Solar System may have lost the original “Planet Nine”

The Solar System’s current planetary orbits seem stable, but that’s only because the planets have settled into them over billions of years. The early Solar System was a much different place than that ...
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Lego is giving away a fun Planet model for free. Here’s how to get yours on June 11.

FREE LEGO: On June 11, build a Lego Planet model at participating stores and take it home with you for free. Find participating stores here. Here we go again. Lego has been running make and take ...