Some users also shared some cool space facts. For instance, u/Public_Breath6890 shared that 99.85 percent of the mass in our solar system is concentrated in the Sun. That's pretty insane, right?

The beautifully illustrated — aimed at children and middle-schoolers, but just as fascinating for adults — manages to answer questions you've always pondered, and ones you never thought to ask.

All About Space issue 129 uncovers astonishing facts about our solar system, the anatomy of white dwarf stars and a mystery surrounding weird filaments in the Milky Way.

In this episode of The List Show, host and Mental Floss editor-in-chief Erin McCarthy covers some facts about space that are going to warp your perspective.

So far, the mysterious X-37B space plane has conducted six missions, and here are 10 surprising facts about the classified vehicle.

Key Facts Launching Space Biology will bring around 40 scientists and early-career researchers from around the world, to learn and discuss the novel interdisciplinary field of space biology. On the 5 ...