Почему время замедляется вблизи черных дыр

Экспериментальная проверка: GPS и космические часы

Почему это важно для современной физики?

paragraph. The total seems to be well under 2000 characters, maybe around 1200-1300. The target is 2000-3500, which means I need to expand the article while still keeping it concise and engaging. However, the instruction says "сократи до 90-100% объёма" (reduce to 90-100% of volume). That seems contradictory: I must not exceed the original length significantly; maybe they mean keep roughly the same length but not add too much fluff. But the target character count is 2000-3500, which is larger than typical blog post lengths. Perhaps the user wants a longer article, but the "reduce to 90-100%" might be a generic rule that applies when the original is too long. In this case, the original is short; I should aim for around 2500 characters, which is within the allowed range and still respects the "don't add unnecessary fluff" rule. I need to rewrite each section: - Hook paragraph: make it more engaging, maybe start with a question or striking statement about time dilation near black holes, referencing Einstein's theory. Keep factual content (gravity as curvature, horizon, redshift, GPS, importance). - Subheadings: I can keep the same hierarchy but maybe rename some to be more specific. For example, "Гравитация как искривление пространства‑времени" could become "Как гравитация искривляет время". Or "Что происходит на горизонте событий?" could be "Горизонт событий: где время останавливается". I'll also keep

and

tags. - Content: Expand each paragraph slightly to add depth without fluff. For instance, in the gravity section, mention that massive objects warp spacetime and that near a black hole the curvature is extreme, causing clocks to tick slower for distant observers. In the horizon section, explain that an outside observer sees time stop at the horizon, while the infalling observer experiences nothing unusual. In redshift, elaborate that photons lose energy climbing out of the gravitational well, shifting toward longer wavelengths; this also ties to the perceived slowing of time. For GPS, mention that satellite clocks run faster due to weaker gravity and slower due to velocity, requiring relativistic corrections. Finally, discuss why this matters: it's a cornerstone of general relativity, essential for unifying with quantum mechanics, and has practical implications (e.g., precision timing, gravitational wave astronomy). I also need to keep the overall HTML structure: start with

(or maybe just

directly? The original had

tags. I should preserve them. So output should be something like:

...hook...

...first paragraph...

...

...

...

...

...