How do we know we live in a spiral galaxy?

When you look toward the galactic center with your eye, you see a long, thin strip. This suggests a disk seen edge-on, rather than a ellipsoid or another shape. We can also detect the bulge at the center. Since we see spiral galaxies which are disks with central bulges.

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No one could turly know just as ppl say the earth is flat only people would know if your up there in space youself lol even thoe you would even reach far enough to even see the spiral

Explanation: