composition of universe of
- Kennesaw Mountain (Wikipedia)
Kennesaw Mountain is a mountain between Marietta and Kennesaw, Georgia in the United States with a summit elevation of 1,808 feet (551 m). It is the highest point in the core (urban and suburban) metro Atlanta area, and fifth after further-north exurban counties are considered. The local terrain averages roughly 1,000 feet (300 m) AMSL.
- Antimatter (Wikipedia)
In modern physics, antimatter is defined as matter composed of the antiparticles (or “partners”) of the corresponding particles in “ordinary” matter, and can be thought of as matter with reversed charge, parity, and time, known as CPT reversal. Antimatter occurs in natural processes like cosmic ray collisions and some types of radioactive decay, but only a tiny fraction of these have successfully been bound together in experiments to form antiatoms. Minuscule numbers of antiparticles can be generated at particle accelerators; however, total artificial production has been only a few nanograms. No macroscopic amount of antimatter has ever been assembled due to the extreme cost and difficulty of production and handling.