50 Interesting Solar System Facts Scientists Have Learned So Far

At apogee, when the Moon is farthest from the Earth, it's about 398,000 km surface-to-surface.

If we align the planets through their polar axes, they add up to a total distance of 364,799 km.

It is the sole other place in the Solar System known to have an earthlike cycle of liquids raining from clouds, flowing across its surface, filling lakes and seas, and evaporating back into the sky (akin to Earth’s water cycle).

There is about 8850 of those satellites still in space, while about 6700 is still operational.

The Sun will eventually run out of energy, like all stars do.

When it starts to die, the Sun will expand into a red giant star, becoming so large that it will engulf Mercury and Venus, and possibly Earth as well.

It has giant fault canyons as much as 12 times as deep as the Grand Canyon, terraced layers and surfaces that appear very old, and others that look much younger.

There's also evidence that it has an underground saltwater ocean containing more water than all the water on Earth combined.