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 ...

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

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 ...

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