Flag of the Earth
The idea of a flag of the Earth is a flag used to represent the Earth. Concepts revolving around this theme include political, spiritual and environmental aspects of the planet. Although there is no internationally agreed upon flag to represent the whole planet, some individuals and organizations have promoted designs for a flag.
To date no flag has received any "official recognition" by any governmental body. The most widely recognized flags associated with Earth are the Earth Day flag and the United Nations flag. Listed below are the unofficial contenders for a possible Flag of Earth.
John McConnell's Earth Day flag
A flag designed by John McConnell in 1969 for the first Earth Day is a dark blue field charged with The Blue Marble, a famous NASA photo of the Earth as seen from outer space. The first edition of McConnell's flag used screen-printing and used different colors: ocean and land were white and the clouds were blue. McConnell presented his flag to the United Nations as a symbol for consideration.
Because of the political views of its creator and its having become a symbol of Earth Day, the flag is associated with environmental awareness, and the celebration of the global community. It was offered for sale originally in the Whole Earth Catalog, and is the only flag which is currently endorsed by McConnell.
The Blue Marble image was placed in the public domain where it remains to this day. The public nature of this image was the basis of a legal battle that resulted in the invalidation of a trademark and copyright that was originally issued to the Earth Day flag through its original promotional entity, World Equity, Inc. This does not invalidate the official history of McConnell's flag, only the official patent that was issued on it.
One Flag in Space
The One Flag in Space initiative is an offshoot of the Space Generation Congress (SGC), the Space Generation Advisory Council's yearly world meeting. It promotes usage of the Blue Marble flag for space exploration (it does not explicitly mention it being McConnell's design).
James W. Cadle's "Flag of Earth"
Another Earth flag was created around the same time in 1970 by a farmer from Illinois named James W. Cadle. Cadle's version of the Earth flag consists of a blue circle representing Earth in the center of the flag, a segment of a large yellow circle representing the sun and a small white circle for the moon, all on a black background. It is particularly popular amongst SETI researchers and is used by SETI worldwide. The flag flies at the Ohio State University Radio Observatory and was lowered to half mast when Carl Sagan died. Flag of Earth Co. International was also founded by Cadle which sold the flag. The Flag of Earth became public domain in 2003.
YouTube uses a small thumbnail image of this flag next to a user's name when the site cannot determine geo-location during a comment post.
World Peace Flag
James William van Kirk, a minister from Youngstown, Ohio, designed a peace flag with rainbow stripes, stars and a globe. With this flag, he twice made a peace tour through Europe. The Universal Peace Congress adopted this flag as its World Peace Flag.
United Nations flag
The flag of the United Nations has been used to indicate world unity, although it technically only represents the United Nations itself. It has a geographical representation of the planet, and its high visibility usage makes it a well-known contender for representing Earth. During the planning for NASA's moon landings of the 1960s, it was suggested that a UN flag be used in place of the flag of the U.S.
The World Flag
The World Flag is an international flag created in 1988 by Paul Carroll (an American citizen) to increase awareness of common challenges for humanity with regard to globalization in today's world. In the center of the flag, there is a world map surrounded by the flags of 216 countries and territories and the UN flag. 
The International Flag of Planet Earth
In May 2015, a new flag was proposed to be used by Earth's astronauts and on spaceships.  The design consists of seven inter-linked white rings on a blue background. The rings represent the interdependence of life on earth, while the blue alludes to the planet’s vast oceans. The design was conceived by Oskar Pernefeldt, a Swedish design researcher, with contributions from NASA. Link to image of The International Flag of Planet Earth
The Peace flag
- Weir (2007). Peace, Justice, Care of Earth. Press On Publishing. ISBN 0971749124.
- "Authentic Earth Flag". Earthflag.net. Retrieved 2010-10-25.
- "Carl Sagan". Xs4all.nl. Retrieved 2010-10-25.
- Corien Glaudemans, 'Een vredesapostel uit Ohio', in: Den Haag Centraal, 16 oktober 2009.
- Devere Allen, "The Fight for Peace". 1940. p.553.
- Platoff, Anne (August 2003). "Where No Flag Has Gone Before: Political and Technical Aspects of Placing a Flag on the Moon (NASA Contractor Report 188251)". National Aeronautics and Space Administration. Retrieved 2008-12-07.
- Grigg, Sarah (January 2008). "The World Flag Project" (PDF). North American Vexillological Association. p. 5-8. Retrieved 27 January 2015.
- "New flag proposed to represent planet Earth on its journey into space". The Independent Online. May 2015. Retrieved 23 May 2015.
|Wikimedia Commons has media related to Flags of Earth.|
- Authentic Earth Flag Website Official Website
- Authentic Earth Flag Endorsement John McConell's Endorsement of earthflag.net as the Authentic Earth Flag.
- The History of Earth Day and the The Authentic Earth Flag by John McConnell
- Flags of the World
- James Cadle's "Flag of Earth" description
- Flag Of Planet Earth Proposal by artist Oskar Pernfeldt