A Cosmic Crash Shook the Milky Way!
Автор: Cosmic Void
Загружено: 2025-10-10
Просмотров: 417
In 2025, ESA's Gaia mission mapped a billion stars.
And found a wave.
Not a metaphor. An actual vertical displacement rippling across 50,000 light-years of the Milky Way's outer disk.
700 parsecs tall. Displacing stars by 2,300 light-years from where they should be.
Something massive hit our galaxy... and this is the scar.
Three questions emerged immediately.
...
ESA's Gaia Data Release 4 in 2026 will reveal whether the Great Wave is propagating, damping, or driven by something ongoing.
Subscribe to track the data as it arrives—and explore how astronomers will test the competing models: Sagittarius collision, dark subhalo impact, or superposed perturbations.
Next video: How do you measure invisible dark matter subhalos using only starlight? We'll break down the methodology turning Gaia's maps into dark matter detectors.
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