An analysis of feldspar crystals within the oldest magmatic rocks in Australia has provided a unique insight into Earth's ancient mantle and continents, and the early beginnings of the moon.

The Earth's Moon is its only one, but scientists recently discovered a new celestial body that will be staying near the planet for the next several decades.

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But mitigating this is its far greater distance, plus the fact that Earth appears much smaller in the sky. So, irritatingly, when it’s closest to Mars, it’s faint, and when it’s farthest from Mars, it’s also faint!

Most people would think that Earth only has one moon, but in reality it's had multiple moons on more than one time. And right now is one of those times.