At first, the skin turns red in the area of the infection, and a tender lump develops. After four to seven days, the lump starts turning white as pus collects under the skin. If the infection spreads to the deeper tissues of the skin, then it becomes an abscess or furuncle.
The International Space Station cruises at about 17,500 mph. The International Space Station has an average elevation of about 220 miles when orbiting Earth. Every hour and a half, the International Space Station completes an orbit around Earth.
Further away from the earth, the ISS uses less fuel maintaining its orbit, but more is used keeping the station supplied and transferring crew. A balance has to be struck between these factors. At an altitude of 220 miles (354 km), the ISS uses about 19,000 lb (8618 kg) of propellant each year adjusting its orbit. At its planned orbit of 248 miles (400 km), the station will require fewer adjustments, and would only need to use 8,000 lb (3629 kg) of fuel.