Galaxia X- ¡La NASA Finalmente Encontró la Galaxia Desconocida que Orbita la Vía Láctea!

·17 min·1 clip

The Earth's fiery iron heart might be slowing down and reversing its spin—what does that mean for our planet?

The episode begins by describing Earth's inner core as a hot, solid sphere of iron and nickel that generates the planet's magnetic field. It explains how scientists use seismology to study this inaccessible region, comparing it to a sonic scanner. A 2023 study published in Nature Geoscience by researchers from Peking University is cited, revealing the inner core's rotation has been decelerating since 2009 and may be reversing direction, possibly due to gravitational and magnetic interactions with the mantle and outer core. The episode notes this is not catastrophic for life on Earth. The focus then shifts to astronomy, reporting that scientists have for the first time observed a star engulfing a planet. This event occurred in the Milky Way, about 12,000 light-years away, involving a star similar in mass to the Sun and a Jupiter-like planet. The star brightened dramatically over 10 days as it consumed the planet. The episode predicts a similar fate for Earth in about 5 billion years when the Sun expands. Next, it discusses the supermassive black hole at our galaxy's center, Sagittarius A*, suggesting it might be active and emitting jets of gas, akin to 'burps,' as observed with the Hubble Space Telescope. Finally, the episode covers the discovery of two supermassive black holes in merging galaxies, detected by the ALMA telescope array in Chile. These black holes, with masses millions of times that of the Sun, are orbiting only 750 light-years apart, the closest pair ever observed, and their eventual collision could produce gravitational waves. The episode concludes by noting such binary black holes may be more common than previously thought.

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