The Moon


Even though it has only 1.2 percent of the mass of Earth, the Moon is still the fifth largest planetary satellite in the Solar System. When full, it is the brightest object in our sky after the Sun, and its gravity exerts a strong influence over the planet. However, the Moon is too small to… Continue Reading →

Dwarf Planets


There are three dwarf planets in the Solar System. The best known, Pluto, was classed as a planet from its discovery in 1930 until 2006. Its planetary status became perilous when Kuiper Belt objects were discovered in the 1990s. After one larger than Pluto was found, astronomers agreed to a new class of object –… Continue Reading →

Planet Neptune


Neptune is the smallest and the coldest of the four gas giants, as well as the most distant from the Sun. It was discovered in 1846, and just one spacecraft, Voyager 2, has been to investigate this remote world. When the probe flew by in 1989, it provided the first close-up view of Neptune and… Continue Reading →

Planet Uranus


Uranus is the third largest planet and lies twice as far from the Sun as its neighbour Saturn. It is pale blue and featureless, with a sparse ring system and an extensive family of moons. The planet is tipped on its side, and so from Earth the moons and rings appear to encircle it from… Continue Reading →

Planet Saturn


Saturn is the second largest planet and the sixth from the Sun – it is the most distant planet normally visible to the naked eye. A huge ball of gas and liquid, Saturn has a bulging equator and an internal energy source. With a composition dominated by hydrogen, it is the least dense of all… Continue Reading →

Planet Jupiter


Jupiter is the largest and most massive of all the planets. It has almost 2.5 times the mass of the other planets eight planets combined, and over 1,300 Earths could fit inside it. Jupiter bears the name of of the most important of all the Roman gods (known as Zeus in Greek mythology). The planet… Continue Reading →

Planet Mars


Mars is the outermost of the four rocky planets. Also known as the red planet because of its rust-red color, it is named after the Roman god of war. Its varied surface features include deep canyons and the highest volcanoes in the Solar System. Although Mars is now a dry planet, a large body of… Continue Reading →

Planet Earth


Earth Is the third closest planet to the Sun. The largest of the four rocky planets, it formed approximately 4.56 billion years ago. Earth’s internal structure is similar to that of its planetary neighbors, but it is unique in the Solar System in that it has abundant liquid water at its surface, an oxygen rich… Continue Reading →

Planet Venus


Venus is the second planet from the sun and Earth’s inner neighbour. The two planets are virtually identical in size and composition but these are very different worlds. An unbroken blanket of dense clouds permanently envelops Venus. Underneath lies a gloomy, lifeless, dry world with a scorching surface, hotter than that of any other planet…. Continue Reading →

Planet Mercury


Mercury is the second smallest planet in the Solar System, the closest planet to the Sun, and the richest in iron. The surface environment is extremely harsh. There is hardly any shielding atmosphere, and the temperature rises to a blistering 430℃ during the day then plummets to an air freezing -180℃ at night. No other… Continue Reading →