Go outside on a dark night and look at the Milky Way: you'll see (at the right time of the year) that it's tilted at a large angle to the celestial equator. (T

Go outside on a dark night and look at the Milky Way: you'll see (at the right time of the year) that it's tilted at a large angle to the celestial equator. (There's also the fact that the Earth's axis is tilted relative to the Ecliptic, of course.)