Anne Helmenstine


Earth Alchemy Symbol
Alchemy is the philosophy and natural science that predates the modern science of chemistry. The word “alchemy” comes from the Arabic word al-kimia. Al kimia is the name of the ancient Egyptian process used to make the Philospher’s Stone or Elixir. Originally, kimia came from the Coptic work khem, which […]

Alchemy Symbols and Their Meanings


The 'squared circle' or 'squaring the circle' is a 17th century alchemical glyph or symbol for the creation of the Philosopher's Stone. The Philosopher's Stone was supposed to be able to transmute base metals into gold and perhaps be an elixir of life.
Alchemy Definition Several definitions of alchemy exist. Originally, alchemy was an ancient tradition of sacred chemistry used to discern the spiritual and temporal nature of reality, its structure, laws, and functions. Alchemy is often considered a predecessor to the modern science of chemistry. The word alchemy comes from the Arabic […]

What Is Alchemy? Definition




In addition to the prestige of winning an event at the Olympics, the victor receives a gold medal. At one time, Olympic gold medals were real solid gold. However, the last time a solid gold medal was awarded was at the 1912 Stockholm Olympics. Modern Olympic gold medals are sterling […]

Are Olympic Gold Medals Real Gold?


Astronomers believe it's possible for a moon to have a moon of its own.
We all know planets orbit stars and moons orbit planets. Have you ever wondered whether a moon can have a moon of its own (a submoon)? Theoretically, the answer is yes, but there is a good reason why we haven’t discovered any submoons around moons in our own solar system. […]

Can a Moon Have a Moon?


The average distance between the Earth and the Sun is about 93 million miles. (NASA)
All of the planets, comets, and asteroids in the solar system orbit the Sun. The average distance between the Earth and the Sun is 92,955,807 miles (149,597,870 km). Most people just round it up to 93 million miles. This distance is called an astronomical unit or AU and is used […]

How Far Is the Sun From Earth?