For other uses, see Sun (disambiguation). The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process. It is by far the most important source of energy for life on Earth.
Buying and installing a customer-owned aboveground propane tank runs about $450-$1,000 for a 120- or 250-gallon tank and $800-$2,500 for a 500-gallon aboveground tank. Installing an underground tank can cost around $1,800-$3,000 for 500 gallons and $2,000-$3,500 or more for 1,000 gallons. A Wisconsin propane dealer charges $1,599 to install a typical 500-gallon aboveground tank and $2,995 for a 1,000-gallon underground tank.
  A 20 pound propane tank holds 4.1 gallons of LP which equates to about 0.016 cubic meters.     If your heater burns 3 m3 per hour the tank will last about 19 sec â¦ onds.ne pound of propane contains 21500 BTU (around 6.3 kWh). An average grill might have burners with individual output of around 30000 BTU at full output. Therefore 1 lb of propane will, in theory, last for around (21500 / 30000) * 60 = around 43 minutes.