How fast is the planet Earth through space? | By Ethan Siegel | Start with an explosion! | Jun, 2025

The earth revolves on its axis and revolves around the sun, which in turn orbit around the galactic center at speeds of hundreds of km/s. In our neighborhood, the speed of the sun and the other stars around the galactic center has an uncertainty of about about ~ 10%, or ~ 20 km/s, which is the greatest factor of uncertainty when it comes to calculating our cumulative movement through the universe. (Credit: Jon Lomberg and Nasa)

It turns on its axis, revolves around the sun, moves throughout the Milky Way and is transported by our galaxy throughout the space.

Ethan Siegel

No matter what perspective you choose to look at it, Planet Earth is always moving. Our planet revolves on its axis continuously, turning and completing a complete 360 ​​° rotation once a day. As we turn, we also turn around the sun, completing a trip of almost one billion kilometers every year. In addition, the entire solar system, the sun, the planets, the moons and everything else, moves through the Galaxy of the Milky Way, orbiting around the galactic center in much larger time scales than humanity has existed. And finally, the dairy road galaxy moves within the local group, which moves through intergalactic space.

Depending on what we measure our movement in relation, we can quantify how fast the planet earth moves through the universe. Although our movement is barely detectable through the experiments that we can do here on Earth, a look at the universe allows us to precisely understand how we are moving on each scale. This is how we know what our cosmic movement is, from each individual component to all the cumulative effects of everything combined.

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