Astronomy is an observational science. This paper points out that in thedevelopment of astronomy, the means of observation at every stage has as its mainbody th
We investigate the wavelet transform of yearly mean relative sunspot number series from 1700 to 2002. The curve of the global wavelet power spectrum peaks at 11
We have accurately evaluated the halo pairwise velocity dispersion and the halo mean streaming velocity in the LCDM model (the flat ω0 = 0.3 model)using a set