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The solar system does not end neatly at Neptune’s orbit. This episode reveals the vast, invisible structure of icy debris beyond the known planets, shaped by gravity and time. From scattered objects ...

Gravity is the force that governs the structure and motion of the solar system, keeping celestial bodiestogether in a cosmic dance. The sun, with its immense mass, generates the strongest ...

There’s a bit of a paradox about our galaxy: it’s both jam-packed with stars and cavernously empty. The Milky Way is crowded in the sense that it holds hundreds of billions of stars, as well as ...

Physics is most readily applied to relatively simple systems: a pendulum, two electrons colliding or the structure of the ...

In humanity’s millennia of staring at the stars and decades of launching probes to explore our universe, only two spacecraft carrying working instruments have ever managed to escape the bubble of ...