1. So, the Greenwich Meridian would be here, now, the one on the x axis.

2. Terrestrial longitude is measured in degrees east or west of the Greenwich meridian.

3. This fact is recorded on a building in Eastgate where a plaque marks the exact point of the Greenwich Meridian.

4. Bearded and looking tired, a clearly emotional Lewis crossed the Greenwich Meridian line at the Royal Observatory by carrying his boat with the help of supporters and cheering well-wishers.

5. Once again, it's important to note that this occurred at the Greenwich meridian.

6. The rare lunar eclipse has fallen on the winter solstice at the Greenwich meridian of December 21, 2010, making the day the "darkest" ever in 372 years.

7. GMT is a universal time zone, based on the Greenwich meridian corrected by the longitude of the location in which the time is set.

1. Terrestrial longitude is measured in degrees east or west of the Greenwich meridian.