I am curious, if NASA have met aliens and invite them to dinner, and made the flag for earth so aliens won't get lost in their way to our planet
In the twenty first century, flags are obsolete. Any alien species with the FTL travel capability necessary to reach Earth would view flags as barbaric territorial symbols, the sure sign of an infant species dangerous to themselves and others.
"Nationalism is an infantile disease. It is the measles of mankind."
-Albert Einstein
Flags, eternally the heralds of war.
Planetism is nothing more than nationalism hubristically projected into the future. Life is unfathomably scarce and therefore infinitely precious out there in the endless dark, this is a self-evident universal truth. Consider for a moment, that most of the mass of our planet consists of core and mantle, where no life exists. Only a thin layer of crust and a narrow slice of atmosphere - only that little bubble supports life. It is this tiny slice that Homo Sapiens, the singular gods of Earth are destroying and poisoning. At least 10
14 miles (~20 lightyears) of space in every direction is the cold void, darkness, death.
If we continue on our current path, we
turn Earth into Venus, in doing so we burn the only known harbor of life within 10
14 miles, and probably farther.
The guy was right above the ''flower of life'' 
The concept behind the theory can be disproved by even the simplest of minds. There is no need to study mathematics for 10 years to see the cracks in the reasoning. 
