Galileo Galilei (1564-1642) â Astronomer and Scientist. Galileo developed a superior telescope and made many significant discoveries in astronomy.He was sentenced to life imprisonment by the inquisition for his support for the Copernican theory that the sun was at the centre of the solar system.alileo Galilei (1564-1642) â Astronomer and Scientist. Galileo developed a superior telescope and made many significant discoveries in astronomy.
Virtually all particles in the air have a positive charge, while negative ions have a negative charge. In which case, negative ions and particles magnetically attract to one another. When there is a high enough concentration of negative ions in the air, they will attract to floating particles in large numbers.
A positive ion is a particle with some negative charge taken away and a negative ion is a particle with some extra negative charge added. Some liquids conduct electricity  these contain ions and some do not  these do not contain ions. Some conduct well, they have many ions per cubic metre, others do not  they have fewer ions per cubic metre. The following list separates some common liquids into conductors and non-conductors.