We have a SOLAR ECLIPSE when the EARTH passes in the cone of umbra or the cone of penumbra of the MOON. The SUN, the MOON and the EARTH are then practically aligned and this when the new MOON approaches.
If the EARTH crosses the axis of the cone of umbra of the MOON, we speak about TOTAL SOLAR ECLIPSE. There is TOTAL ECLIPSE, when the apparent diameter of the MOON is larger than the apparent diameter of the SUN. In the umbra zone called totality line, it is pitch dark, since the MOON masks the SUN completely.
The conical umbra is accompanied by a penumbra zone where a part of the SUN remains visible. The ECLIPSE is PARTIAL in this zone.
If the EARTH passes only in the cone of penumbra of the MOON we have a PARTIAL ECLIPSE OF THE SUN. |