Why is large wavelength so imporant? How does this tie in with quantum mechanics?
Are Bose-Einstein condensates a new state of matter. Return to top of page and menu Neutron stars. At exceedingly high pressures and temperatures, electrons and protons can combine to form neutrons. This happens in some massive stars when they cool enough for their gravity to squeeze the atoms into ultra high density. A whole, star bigger than the sun, becomes something rather like a gigantic atomic nucleus, several km in diameter, containing only neutrons. Dark matter. Most of the matter in the universe is not in stars, as was thought until recently. Because it’s not in stars, this matter doesn’t shine, whence ‘dark matter’. Planets, comets and dust are all dark matter, but these are thought to be much less massive than their stars, and so negligible in cosmology. Many cosmologists believe that most of the matter (or perhaps energy) in the universe exists in large ‘clouds’ around galaxies called MACHOs (MAssive Compact Halo Objects). Many others believe it is in undetected particles c
