TIM:When I was up on the ISS, that different perspective really brought home the sheer scale of the universe. The vastness of our Solar System and the distances involved is something that's hard ...

The inner Oort cloud, between 1,000 and 10,000 AU from the sun, displays a spiral formation with arms that extend 15,000 AU.

That’s 93 million miles, but by using those units, the size of the solar system can be scaled down. “The distance from the sun to Pluto is 40 astronomical units, so this model is at the scale ...

A mysterious cloud of space rock and debris in the outer reaches of our solar system might resemble a miniature galaxy, a new ...