A region that currently displays an aurora is called the "auroral oval", a band displaced by the solar wind towards the night side of Earth. Most auroras occur in a band known as the "auroral zone", which is typically 3° to 6° wide in latitude and between 10° and 20° from the geomagnetic poles at all local times (or longitudes), most clearly seen at night against a dark sky. Ancient Greek poets used the name metaphorically to refer to dawn, often mentioning its play of colors across the otherwise dark sky ( e.g., "rosy-fingered dawn"). The word " aurora" is derived from the name of the Roman goddess of the dawn, Aurora, who travelled from east to west announcing the coming of the sun.