Cosmic microwave background
Cosmic microwave background. Spherical projection of the cosmic microwave background, using all-sky data from the WMAP (Wilkinson Microwave Anisotropy Probe). Since it is a spherical projection, it only shows half the sky. The microwave background is radiation from the beginning of the universe (actually 380, 000 years after its creation) that has been stretched (cooled to around 3 Kelvin) by the expansion of the universe. The colours show the variation in the temperature (then equivalent to density) of the early universe. Denser regions (red, yellow) formed the seeds of galaxies and other structures. Data obtained in 2003.
© NASA/WMAP SCIENCE TEAM/SCIENCE PHOTO LIBRARY
Big Bang and early galaxies
Big Bang and early galaxies. Galaxies forming in the early universe following the Big Bang, the initial expansion of all the matter in the universe from an infinitely compact state some 13.7 billion years ago. The galaxies formed some 500 million years after the Big Bang, and are still receding from each other today. This recession of the galaxies is a key piece of evidence for the Big Bang theory.
© RICHARD KAIL/SCIENCE PHOTO LIBRARY
Tour of the Colonies - Ceylon Arrival
Tour of the Colonies - Ceylon Arrival - Railway Station decorated for arrival by Royal couple. Part of Box 246 Boswell collection - Tour of the Colonies. Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka and known from the beginning of British colonial rule until 1972 as Ceylon is an island country in South Asia near south-east India. Date: circa 1900
© The Boswell Collection, Bexley Heritage Trust / Mary Evans