The Solar System Is Not Floating Through Empty Space And We Just Found What's Pushing Back скачать в хорошем качестве

The Solar System Is Not Floating Through Empty Space And We Just Found What's Pushing Back

This documentary investigates what Voyager 1 and Voyager 2 actually found when they crossed the boundary of the solar system and entered interstellar space, beginning with the fifty years of theoretical predictions that preceded their arrival at the heliopause and examining in detail why nearly every specific prediction turned out to be wrong. We explore the structure of the heliosphere from the inside out, tracing how the sun's solar wind — one million tonnes of charged particles expelled every second at four hundred to eight hundred kilometers per second — inflates a vast magnetized bubble around the solar system, how that bubble interacts with the interstellar medium pressing against it from outside, and why the simple pressure-balance models that predicted a gradual, teardrop-shaped boundary failed to capture the complexity of what Voyager actually measured. We examine the IBEX ribbon in detail — a narrow band of intense energetic neutral atom emission wrapping around the entire sky, discovered in 2009, completely unpredicted by any existing model, and still without a definitive theoretical explanation fifteen years after its discovery — and what its existence reveals about the interstellar magnetic field's control over the heliosphere's structure in ways that pre-mission models had entirely missed. We investigate Voyager 1's termination shock crossing in December 2004 at ninety four astronomical units, where the solar wind abruptly decelerated from four hundred kilometers per second to one hundred and fifty kilometers per second in a boundary thin enough to cross in days, and the anomalous energetic particle measurements that followed which suggested the termination shock was not accelerating particles the way diffusive shock theory predicted and which remain unresolved in the literature today. We analyze the critical asymmetry revealed by Voyager 2's termination shock crossing in August 2007 at eighty four astronomical units — ten astronomical units closer to the sun than Voyager 1's crossing despite traveling in a completely different direction — confirming for the first time through direct measurement that the heliosphere's shape is controlled not just by solar wind pressure from inside but by the interstellar magnetic field pressing asymmetrically from outside, making the heliosphere a dynamic structure continuously shaped by its galactic environment rather than a self-contained bubble floating passively through space. We examine the turbulent heliosheath in detail, tracing eight years of Voyager 1 measurements through the chaotic region between the termination shock and the heliopause, including the discovery of the magnetic highway at approximately one hundred and thirteen astronomical units where low-energy solar particles streamed out and galactic cosmic rays streamed in along field lines directly connected to interstellar space, suggesting a permeable rather than sealed boundary. We confront the heliopause crossings of both spacecraft — Voyager 1 in August 2012 at one hundred and twenty two astronomical units and Voyager 2 in November 2018 at one hundred and nineteen astronomical units — analyzing the sharp boundary signatures including the magnetic field rotation of approximately forty degrees, the collapse of solar wind particle flux to essentially zero, the jump in galactic cosmic ray intensities, and most critically the plasma density forty times higher and temperature of one hundred thousand Kelvin immediately outside the boundary that invalidated every pre-mission model of the local interstellar medium. We explore what these measurements reveal about the Local Interstellar Cloud and the Local Bubble — the supernova-carved cavity the solar system currently travels through — and what the specific properties of the plasma surrounding our heliosphere tell us about the sun's galactic environment and how it has shaped the conditions for life on Earth over billions of years. We examine the cosmic ray shielding the heliosphere provides, quantified for the first time by comparing Voyager measurements inside and outside the heliopause, showing a factor of two to three reduction in biologically relevant low-energy cosmic ray flux that makes Earth's surface measurably more habitable than it would be without the heliosphere's protection. We investigate the power decline aboard both spacecraft, now generating barely enough electricity to run a handful of instruments, the systematic shutdown of heaters and detectors to conserve power, and the closing window for interstellar measurements that will end sometime between 2025 and 2030 when the power falls below the threshold needed to operate any scientific instrument and transmit results across twenty two billion kilometers at one hundred and sixty bits per second.