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A unit of length = 1.0E-08cm.
The serial number assigned to 27-day recurrence periods of solar and geophysical parameters. The equatorial rotation rate of the Sun is very close to 27 days. Rotation 1 Day 1 in this sequence was assigned arbitrarily by J. Bartels to February 8, 1832.
123456
An historic term for sunspot number . In 1849, R. Wolf of Zurich originated the general procedure for computing the sunspot number.
An energy efficient product is one using less energy, though working as well, than a standard product. It may be a light bulb, sparing up to 80% energy, or a computer or a fridge or any other modern electrical appliance.
The mean Earth-Sun distance, equal to 1.496E+13cm or 214.94 solar radii.
123456
As Low As Reasonably Achievable