Matter at such a temperature will radiate strongly at the x-ray wavelength. The nearest spiral type galaxy similar to our own Milky Way. Slightly bigger than our own galaxy, Andromeda has about 300 billion stars, compared to our 100 billion. The opposite of the basic unit of matter. The development of a theroy combining the Special Theroy of relativity with Quantam Mechanics led to the prediction of the existance of antimatter, which has been proven since.
Antimatter behaves in almost all respects like ordinary matter.
In a striking demonstration of the equivalence of restmass and energy, a particle of matter and its antiparticle counterpart can be simultaneously created from the pure energy of a photon. Any star over a value of 2-3 solar masses will cause its remnant core to collapse indefinately, becoming a black hole. Generally found in the halo of the galaxy. Globular clusters are generally thought to represent remenants of the formation of galaxies. Lagrangian Points Stable points in the orbit of a third body in a binary system.