Learn the differences between our Earth, the Sun and the Moon. Then explore how together they create day and night and our different seasons with their orbits.

So here's what it comes down to: If you want to show the Earth-sun-moon system, you'd seem to have two options. You could show them at their correct size, but not in their correct locations.

While the term “planet” has a clear definition, there is no strict definition of a moon. We can either say that there is one moon around Earth, or more than 160 million moons.

Learn how Earth's moon formed, how its orbit affects Earth's tides, why solar and lunar eclipses happen and the history of lunar exploration.

Since then, the vehicle—equipped with 16 cameras on its exterior and interior—has flown by the lunar surface and captured various stunning images of both the moon and Earth.

Not only will Friday’s total lunar eclipse be a Blood Moon, but it also lands on Pi Day! Grab a blanket—it won’t be freezing, but it will be in the 40s.

Heat from tidal forces remelted the Moon’s crust, says new reesarch, which may explain why the Moon is older than some samples appear.

A new study suggests we’d have 60-hour days by now if a stalemate between the Sun and Moon hadn’t interfered with Earth’s rotation for over a billion years.

On Earth, you can look up at night and see the Moon shining bright from hundreds of thousands of miles away. But if you went to Venus, that wouldnt be the case.

The height of this arc depends on your location on Earth’s surface, and where the Earth is in its orbit. It also depends on the season: for example, during winter, the Moon has a lower height arc.