How a diesel boiler

Common application To understand the operation of a boiler of diesel, it is useful to observe one of their applications common: as a heating system that is found in many homes and businesses. Consider a common situation that...

Continue reading

Solar activity

Sunspots Sunspots have a dark central part known as the umbra surrounded by a lighter region called the penumbra. Sunspots are dark because they are cooler than the surrounding photosphere. The spots are the place of strong...

Continue reading