1. A person in England can recognize the pole star easily than a person in Bangalore : Pole star appears to be stationary above the Earth’s North Pole, since England lies in the Northern side Northern hemisphere a person in England can recognize pole star than a person in Bangalore. 

2. Mercury in difficult to observe : It is very difficult to observe mercury because it is very close to the sun and most the time it is hidden by the glare of the sun. However it can be seen just before sunrise and just after sunset. 

3. A day on Venus is longer than its year : The period of rotation of Venus is 243 days and the period of revolution is 224 days. Since period of rotation is longer than period of revolution, a day on Venus is longer than its year. 

4. Green house effect is prominent on Venus : Venus is composed mostly of carbon dioxide. There are several layers of clouds many kilo meters thick composed of sulfuric acid. This dense atmosphere of carbon-dioxide blocks the long wavelength infrared radiation and heat is trapped inside, hence the green house effect is prominent on Venus.