Nicolae Sfetcu 
Calatorii in timp 

More than any other book for the introductory human geography course, Contemporary Human Geography shows what geographers actually do – how they conduct research, develop new insights, teach us about …

An astronomer brings the mysteries of space down to earth in this accessible guide to cosmology, astrophysics, and the ageless wonder of the night sky.   The universe is big. Really big. And …

The participation of such diverse scientific and technical disciplines as meteorology, astronomy, atmospheric electricity, ionospheric and magnetospheric physics, electromagnetic wave propagation, …

Reflecting the results of twenty years; experience in the field of multipurpose flights, this monograph includes the complex routes of the trajectories of a number of bodies (e.g., space vehicles, co …

Written by an award-winning cosmologist, this brand new textbook provides advanced undergraduate and graduate students with coverage of the very latest developments in the observational science of co …

Previously published as A History of the Universe in 21 Stars. »REVISED AND UPDATED ___ »A wonderful book about the science, history and mythology of 21 stars (and 3 impostors).» Dr David Whitehou …

The growth of cosmology into a precision science represents one of the most remarkable stories of the past century. Much has been written chronicling this development, but rarely has any of it f …

It is only several decades since galaxies were recognized as huge aggregations of matter in the universe which consist of myriads of stars and vast clouds of gas. The wide variety of shapes of …

Pulsars, generally accepted to be rotating neutron stars, are dense, neutron-packed remnants of massive stars that blew apart in supernova explosions. They are typically about 10 kilometers across …

Dust is widespread in the galaxy. To astronomers studying stars it may be just an irritating fog, but it is becoming widely recognized that cosmic dust plays an active role in astrochemistry. Without …