The source of Earth's solar power: The Sun. Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.
1 The average annual temperature in Vienna, Austria is a little cool at 9.8 degrees Celsius (49.7 degrees Fahrenheit). 2  Mean monthly temperatures vary by 21.5 C (38.7 F) which is a below moderate range.3  The range/ variation of diurnal mean temperatures is 7.3 C (13.2 F).verage Temperatures in Vienna, Austria. 1  The average annual temperature in Vienna, Austria is a little cool at 9.8 degrees Celsius (49.7 degrees Fahrenheit).
Austriaâs average household size is 2.3 compared with the OECD average of 2.6. 5. Austria has the 8th highest public spending on family benefit, at 3.1% of GDP, well above the OECD average of 2.2%. Spending on cash benefits is particularly high, at 2.2% of GDP, which is the 3rd highest among OECD countries.