We wanted to find out the average cost to replace a roof in the UK so we assume the following when we contacted our chosen companies: 1  A detached house with a simple âup and overâ roof design. 2  Approximately 64 square metres.e wanted to find out the average cost to replace a roof in the UK so we assume the following when we contacted our chosen companies: 1  A detached house with a simple âup and overâ roof design. 2  Approximately 64 square metres.
Jovian Planet Characteristics. Jupiter, Saturn, Uranus and Neptune are the four jovian planets of the solar system. The density of these planets is less than that of the earth, as they are mainly formed of hydrogen along with helium and compounds of hydrogen such as methane and ammonia. The mass of these planets is more than 10 times that of the Earth. 2  They have very small cores as compared to the terrestrial planets. 3  Gas storms are a common phenomena on the surface of the jovian planets.
Jupiter, Saturn, Uranus and Neptune are grouped into this category. As the planets in this group have a structure similar to Jupiter, they are called Jovian planets. Unlike terrestrial planets, these have only a small core, which is solid in character.They are huge planets, and the massive size is due to the presence of very thick gas atmospheres, which surround a small core.lanets in both groups have a gaseous atmosphere, but it is very thin in the case of terrestrial planets. All planets are capable of exerting gravtiational force, but the Jovian planets have larger gravitational fields, which help them hold on to their large gaseous atmospheres and numerous moons.