"The book "Solar Matter," owned by the pen of the untimely deceased talented physicist Matvey Petrovich Bronstein, is an extraordinary phenomenon in the field of world popular literature. It is written so simply and fascinatingly that reading it is perhaps ra? vno interesting to any reader from a schoolboy to a professional physicist. Once you start it, it's hard to resist and not finish reading it." (Lev Landau, 1956)