Open source mind

Red is the most common color in national flags


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Earth is the third planet from the Sun
Hydrogen is the lightest and most abundant chemical element, constituting roughly 75 % of the Universe\'s elemental mass
The Sun is the star at the center of the Solar System
The Moon's diameter is 3,474 kilometres
Current interpretations of astronomical observations indicate that the age of the Universe is 13.73 (± 0.12) billion years
Astronomy is not the same as astrology, although 83% of people don\'t know that.
The Moon is the only celestial body on which human beings have made a manned landing
Hydrogen is represented by the symbol H
The meter was originally defined as 1/10,000,000 of the distance from the equator to the North Pole through Paris, France
The average diameter of the Earth is about 12,742 km
The average diameter of the Earth is about 12,742 km
The Moon makes a complete orbit around the Earth every 27.3 days
The Moon is the only celestial body on which human beings have made a manned landing
Hydrogen is the chemical element with atomic number 1
The Soviet Union\'s Luna programme was the first to reach the Moon with unmanned spacecraft
Several mechanisms have been historically proposed for the Moon\'s formation 4.527 ± 0.010 billion years ago
Raw horse meat is a popular food in Japan.
Current interpretations of astronomical observations indicate that the age of the Universe is 13.73 (± 0.12) billion years
About three-quarters of the Sun's mass consists of hydrogen, while most of the rest is helium
The Moon is Earth's only natural satellite



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