![A green laser beam marking the Greenwich Meridian Line shines at night in front of the Canary Wharf skyscraprs in London Stock Photo - Alamy A green laser beam marking the Greenwich Meridian Line shines at night in front of the Canary Wharf skyscraprs in London Stock Photo - Alamy](https://c8.alamy.com/comp/AR0KYN/a-green-laser-beam-marking-the-greenwich-meridian-line-shines-at-night-AR0KYN.jpg)
A green laser beam marking the Greenwich Meridian Line shines at night in front of the Canary Wharf skyscraprs in London Stock Photo - Alamy
![Greenwich Meridian Laser Shining Over London At Night Photograph by Miguel Claro/science Photo Library - Pixels Greenwich Meridian Laser Shining Over London At Night Photograph by Miguel Claro/science Photo Library - Pixels](https://render.fineartamerica.com/images/rendered/small/print/images/artworkimages/square/2/greenwich-meridian-laser-shining-over-london-at-night-miguel-claroscience-photo-library.jpg)
Greenwich Meridian Laser Shining Over London At Night Photograph by Miguel Claro/science Photo Library - Pixels
![Looking At The Green Laser Shining From Greenwich Observatory Across The River Thames London Stock Photo - Download Image Now - iStock Looking At The Green Laser Shining From Greenwich Observatory Across The River Thames London Stock Photo - Download Image Now - iStock](https://media.istockphoto.com/id/1206648335/photo/looking-at-the-green-laser-shining-from-greenwich-observatory-across-the-river-thames-london.jpg?s=170667a&w=0&k=20&c=pfuIx4p8PsnRlFm4LHSjUL_hEEmW6w1b_BQM2vuSrNM=)
Looking At The Green Laser Shining From Greenwich Observatory Across The River Thames London Stock Photo - Download Image Now - iStock
![The O2 on Twitter: "Great pic“@MPSinthesky:@TheO2 with Greenwich Meridian identified by laser from Greenwich Observatory @ROGAstronomers http://t.co/udgv0WwN5v”" / Twitter The O2 on Twitter: "Great pic“@MPSinthesky:@TheO2 with Greenwich Meridian identified by laser from Greenwich Observatory @ROGAstronomers http://t.co/udgv0WwN5v”" / Twitter](https://pbs.twimg.com/media/Bch0AGMIAAAqt12.jpg)
The O2 on Twitter: "Great pic“@MPSinthesky:@TheO2 with Greenwich Meridian identified by laser from Greenwich Observatory @ROGAstronomers http://t.co/udgv0WwN5v”" / Twitter
![Meridian line laser and Flamsteed House, Royal Observatory from the grounds of Royal Museums Greenwich, 2005 (photo) by Meridian line laser and Flamsteed House, Royal Observatory from the grounds of Royal Museums Greenwich, 2005 (photo) by](https://images-cdn.bridgemanimages.com/api/1.0/image/600wm.XXX.18324370.7055475/7339202.jpg)
Meridian line laser and Flamsteed House, Royal Observatory from the grounds of Royal Museums Greenwich, 2005 (photo) by
![What The F*** Facts on Twitter: "A laser shoots across London from Greenwich, signifying the meridian line at 0 degrees longitude. http://t.co/9YyCQPF507" / Twitter What The F*** Facts on Twitter: "A laser shoots across London from Greenwich, signifying the meridian line at 0 degrees longitude. http://t.co/9YyCQPF507" / Twitter](https://pbs.twimg.com/media/Bq38sp4IMAAh2di.jpg)