Why is it usually impossible to see the suns corona from earth?

The Sun's corona is usually impossible to see from Earth because it is much fainter than the Sun's bright photosphere, which outshines it by a factor of millions. The corona becomes visible only during a total solar eclipse when the Moon completely covers the Sun, blocking its light and allowing the corona's faint glow to be observed. Additionally, the corona is best viewed using specialized instruments like coronagraphs that can mimic an eclipse by artificially blocking the Sun's light.