Question: |
What are the four elements according to the ancient Greeks? |
| Answer: | Earth, Air, Fire and Water . |
Question: |
What is the name for the scientific study of heavenly bodies? |
| Answer: | Astronomy. |
| Question: | What Science deals with the structure of the Universe and its origin? |
| Answer: | Cosmology . |
Question: |
Which is the oldest Satellite orbiting the earth? |
| Answer: | The Moon . |
| Question: | What is the common name of the Galaxy we inhabit? |
| Answer: | The Milky Way . |
| Question: | Where is the ‘Sea of Showers’? |
| Answer: | The Moon . |
Question: |
Which is the only day named after a planet? |
| Answer: | Saturday . |
| Question: | Who is considered to be the ‘Father of Modern astronomy’? |
| Answer: | Nicolas Copernicus. |
Question: |
Which is the only clockwise-rotating planet? |
| Answer: | Venus . |
| Question: | Which constellation represents a hunter with a Club and Shield? |
| Answer: | Orion . |
| Question: | What is a Supernova? |
| Answer: | The explosion of a dying star. |
Are contact lenses safe? A contact lenses are small lenses which are placed directly on the surface of an eye so as to correct vision. Contacts have become increasingly popular in recent years due to their cosmetic properties. Though they are very useful, they should be worn carefully as per the instructions for use. Glass contact lenses were first described in 1888 by Adolf Fick and in 1945 Kevin Tuohy produced prototype of plastic lens. Since that time technology has advanced and several different varieties of lenses are now produced. The basic requirement for their success is to overcome the effect on oxygen supply to the cornea from wearing an occlusive lens. There are several types of contact lenses which can be grouped into two major categories. Types of contact lenses Rigid or hard lenses – they are made of polymethylmethacrylate (plastic material). They are not permeable to gases or liquids. They cannot be worn continuously because the cornea becomes h...
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