Sagittarius A*
The supermassive black hole at the centre of the Milky Way
The world's least useful encyclopedia
Black holes, galaxies, comets, asteroids, and other cosmic oddities that defy everyday comprehension.
The supermassive black hole at the centre of the Milky Way
Our home galaxy with hundreds of billions of stars
The nearest large galaxy to the Milky Way
A collapsed stellar core with incredible density
The most famous periodic comet, visible every 75-79 years
The largest object in the asteroid belt
A dead star so dense that light itself cannot escape
Less dramatic than Star Wars suggests — mostly empty space
A 90-minute trip around the entire planet
A spoonful of star that weighs as much as a mountain
282,000 km wide but thinner than a razor blade in proportion