What is the name of event caused by the 3200 Phaethon asteroid around 15 December of every year?

 

 

A cold front is defined as the transition zone where a cold air mass is replacing a warmer air mass. A cold front usually bring the temperature down by more than 15 deg and heavy rainfall with thundering and lighting.

Most known extrasolar planets most resemble to the planet Venus.

Scientists believe that , about 4.6 billion years ago, the solar system was formed when a cloud of gas and dust in space was disturbed, maybe by the explosion of a nearby star called a supernova.

Clay is an example of Aquiclude.

Drowsiness is the state of feeling sleepyness and tired in the day time. It affects our senses especially the sense of vision.

Crystal size in igneous rocks is determined by rate of cooling i.e, the time taken by magma to cool down. 

Hence, the slower the rate of cooling the larger the crystals. The faster the rate of cooling the smaller the crystals.