Question

What are meteor showers ? Do comets have any connection with meteor shower ? what exactly happened in Russia recently ?

Answer 1

A meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories.
A Meteor Shower takes place when the Earth crosses one of the "clouds" of dust that is in the comet's orbital plane.
last one I don't know...