* Earth is constantly moving: Earth spins on its axis and orbits the Sun. So, anything stationary relative to Earth's surface is also moving with Earth.

* "Fastest in space" is ambiguous: Do you mean:

* Speed relative to the Sun: In this case, the Earth's orbital speed is the relevant factor. Objects on Earth's surface are moving at roughly 30 km/s (18.6 miles/s) around the Sun.

* Speed relative to the Milky Way: Earth is also moving within the Milky Way galaxy. Our galaxy is rotating, and the Sun (and us with it) is moving at about 220 km/s (137 miles/s) around the galactic center.

So, to answer your question directly:

* An object on Earth's surface is moving fastest relative to the center of the Milky Way galaxy. This is because the Earth's orbital speed around the Sun is added to the Sun's orbital speed around the galactic center.

However, it's important to note: All speeds are relative. There's no single "absolute" speed for an object in space.