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If space has no friction, why do galaxies slow down?

In this video, we unravel one of the strangest paradoxes in modern cosmology: why massive galaxies, moving through what should be a perfect vacuum, gradually lose speed. From the Andromeda Galaxy racing toward the Milky Way to invisible forces capable of dragging entire star systems, this journey exposes why space is anything but empty.

You’ll discover how Einstein’s idea of “empty” space-time breaks down, why galaxies experience resistance without friction, and how the universe may be filled with unseen structures that shape motion on the largest scales imaginable. We’ll explore the implications of dark matter, quantum vacuum energy, and the cosmic web—forces so subtle yet powerful they can influence billions of stars at once.

Featuring insights inspired by the work of Vera Rubin, precision star-mapping from European Space Agency’s Gaia mission, and recent observations from the James Webb Space Telescope, this video reveals why the universe behaves nothing like we once imagined.

By the end, you’ll see space not as empty nothingness, but as a complex cosmic medium—one that shapes the fate of galaxies, the expansion of the universe, and possibly the ultimate destiny of reality itself.

Subscribe for more deep dives into space, physics, and the hidden forces of the cosmos.

And tell us in the comments: If you could feel the invisible forces slowing down galaxies, what do you think that sensation would be like?


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