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.
1 The outward movement of positive potassium ions makes the inside of the membrane more negative and returns the membrane toward the resting membrane potential (repolarizes the cell). 2  When the membrane potential returns to the resting value, the potassium channels shut down and potassium ions can no longer leave the cell. As we discussed, the inside of the cell is slightly negatively charged (resting membrane potential of -70 to -80 mV). 2  A disturbance (mechanical, electrical, or sometimes chemical) causes a few sodium channels in a small portion of the membrane to open.