A little wonder, every day

Gravity, time, and spacetime near a black hole

AI-generated conceptual rendering of spacetime curvature and gravitational time dilation; not a measured or to-scale diagram.

still frame from NASA Goddard Scientific Visualization Studio’s “Capturing Dark Matter with Black Holes.” The accompanying color bar represents local clock-tick/time-dilation values and accounts for gravity and motion; this is a scientific simulation, not a telescope photograph. https://svs.gsfc.nasa.gov/4183/

Custom source-based educational infographic created 2026-10-19 and visually checked. It summarizes the fact-specific evidence and uncertainty in post.md and sources.md; original Pillow-drawn schematic, no imported photo assets.

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AI-generated conceptual rendering of spacetime curvature and gravitational time dilation; not a measured or to-scale diagram.

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According to general relativity, a black hole’s mass curves spacetime, and a clock closer to it accumulates less time than a clock far away. An observer beside the clock does not notice it falling behind; the difference appears only when it is compared with a distant clock or its signal. Near the event horizon, this difference can become very large.