Volcanic rocks are usually fine-grained or aphanitic to glass in texture. They often contain clasts of other rocks and phenocrysts. Phenocrysts are crystals that are larger than the matrix and are identifiable with the unaided eye.Rhomb porphyry is an example with large rhomb shaped phenocrysts embedded in a very fine grained matrix.Volcanic rocks often have a vesicular texture caused by voids left by volatiles trapped in the molten lava.henocrysts are crystals that are larger than the matrix and are identifiable with the unaided eye. Rhomb porphyry is an example with large rhomb shaped phenocrysts embedded in a very fine grained matrix. Volcanic rocks often have a vesicular texture caused by voids left by volatiles trapped in the molten lava.
The actual temperature in space is about 3Â°K (-270Â°C or three degrees Celsius above Absolute Zero). There are still molecules in space, just very few of them, and this is their temperature. Absolute zero is a theoretical temperature where the thermal kinetic energy of the molecules in a body goes to zero.
I dont know if it qualifies for an object but a supernova explosion has a temperature of around 100 billion degree celsius. And the hottest the universe has ever been is at the time of Big Bang with a temperatue estimated to be around whats popularly called as Planck temperature which is 14 followed by 31 zeros!!!