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🪐 The speed of light—299,792 kilometers per second—is an unbreakable cosmic speed limit, and even within our own Milky Way Galaxy, light takes about 27,000 years to travel from the supermassive black hole Sagittarius A* at the center to reach Earth. This vast timespan means that every glimpse we catch of events near Sagittarius A* shows us history already tens of thousands of years old, making each photon a snapshot from the deep past. ✨ #speedoflight⚡#milkyway⚡#saggittariusA⚡#nasa⚡#galaxy⚡#stars⚡#astronomy⚡#universe⚡#cosmos⚡#space 👉subscribe Universe Mysteries 👉more Channels ​