Colored Gallery

Martin Luther, (1483-1546). German reformer. Luther in Warbu

Martin Luther, (1483-1546). German reformer. Doctor of Theology and Augustinian priest. In 1517, outlined the main thesis of Lutheranism in Wittenberg. He was excommunicated in 1520. Luther in Warburg castle. Engraving by G. Spangerberg. Germania, 1882. Colored

© Thaliastock / Mary Evans

15th, 16th, Age, Augustinian, Castle, Century, Colored, Coloured, Engraving, Excommunicated, German, Germany, Historical, History, Luther, Lutheran, Lutheranism, Martin, Modern, Monk, Portrait, Priest, Protestant, Reformation, Reformer, Religion, Spangerberg, Theologian, Theology, Warburg

Rod and cone cells of the eye, SEM C014/4864

Rod and cone cells of the eye. Coloured scanning electron micrograph (SEM) of rod and cone cells in the retina of a mammalian eye. Cone cells and the more numerous rod cells are specialised light-sensitive cells that occur on the surface of the retina. They are responsible for detecting visible images, which are transmitted as nerve impulses to the optic nerve and the brain. There are about 130 million rod cells in the human retina, which detect light intensity and so are important for day and night vision. The less numerous cone-like cone cells (about 6.5 million in the human retina) respond specifically to colour. Magnification: x5, 300 when printed at 10 centimetres wide

© CLOUDS HILL IMAGING LTD/SCIENCE PHOTO LIBRARY

Mercury hemisphere, MESSENGER image C016/9721

Mercury hemisphere, MESSENGER image. North is at top. This image is centred at longitude 40 degrees West. The colours show chemical and mineralogical differences between the rocks. Crater rays from fresh impacts, are light blue or white. Medium-blue and dark-blue areas may be a dark, opaque mineral. Tan areas are volcanic lava plains. The Murasaki crater (white) is just below and right of centre. Mercury, the closest planet to the Sun, is 4880 kilometres across. MESSENGER entered orbit around Mercury in March 2011. Image published in 2013, using data from the MDIS Wide Angle Camera. For the other side of the planet, see image C016/9722

© NASA/JOHNS HOPKINS UNIVERSITY APPLIED PHYSICS LABORATORY/CARNEGIE INSTITUTION OF WASHINGTON/SCIENCE PHOTO LIBRARY