Updated

Updated · spacedaily.com · Aug 21

Earth Speeds at 107,000 km/h Around Sun as Solar System Races 720,000 km/h Through Galaxy

Updated

Updated · spacedaily.com · Aug 21

Earth Speeds at 107,000 km/h Around Sun as Solar System Races 720,000 km/h Through Galaxy

Q: You feel perfectly still, but what invisible cosmic forces mask the fact that you are traveling millions of miles through space every day?

What masks the motion is not an invisible force but the absence of one. You do not feel Earth’s enormous speed because you, the ground, the oceans and the atmosphere are all moving together at nearly constant velocity. Human bodies detect acceleration and jolts, not smooth, steady motion. That is why Earth can carry you around the Sun at about 107,000 km/h, while the solar system circles the Milky Way at roughly 720,000 to 829,000 km/h, without producing any everyday sensation of rushing through space. Those speeds are real, but each is measured in a different frame of reference. Physics has no single absolute “speed of Earth”; motion only makes sense relative to something else. The familiar comparison is a train. A passenger can be still relative to a seat while moving rapidly relative to the landscape. Earth works the same way. You are stationary relative to your chair, even as your chair is moving with Earth relative to the Sun and galaxy. Earth’s gravity and inertia keep everything bound to the planet, while the planet’s nearly steady motion prevents any constant shove from being felt. The signs of motion appear only indirectly: day and night, the Coriolis effect in weather, the Foucault pendulum, and the slight equatorial bulge caused by rotation. Even larger cosmic motions, such as Andromeda approaching the Milky Way at about 400,000 km/h along our line of sight, do not change that basic fact. Vast speed alone is not what the body feels. Change in speed is.

2 articles · Updated · spacedaily.com · Aug 21

Earth moves at about 107,000 km/h around the Sun, while the solar system circles the Milky Way at roughly 720,000 km/h and Andromeda closes in at about 400,000 km/h.
Those figures are not additive because each is measured in a different reference frame; velocity needs both a direction and a named point of comparison.
NASA lists Earth’s average orbital speed at 107,182 km/h, but that changes through its elliptical orbit, and Earth’s rotation adds up to about 1,670 km/h at the equator.
The galactic figure also varies by model—NASA pages cite both 720,000 km/h and 829,000 km/h—while Andromeda’s line-of-sight approach is well measured but its sideways motion remains uncertain.
Humans do not feel these motions because the body senses acceleration, not constant speed, and Earth, its atmosphere and people share nearly the same gravitational free fall.

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spacedaily.com19h ago

Earth's Unfelt Cosmic Speeds: Orbiting Sun at 107,000 km/h, Galaxy at 720,000 km/h

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spacedaily.com19h ago

Earth's Unfelt Cosmic Speeds: Orbiting Sun at 107,000 km/h, Galaxy at 720,000 km/h

Facebook19h ago

How fast is earth moving in space?

Earth Speeds at 107,000 km/h Around Sun as Solar System Races 720,000 km/h Through Galaxy

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