FLO4628754: Cretan brake fern, Pteris cretica albo lineata. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1870. / Bridgeman Images

FLO4628756: Countryside butterfly, Alstroemeria pulchra (Alstroemeria tricolor) 1 and Lirio de Cordillera, Alstroemeria pallida 2. Chile. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1870. / Bridgeman Images

FLO4628831: Rainer's bellflower, Campanula raineri. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1845. / Bridgeman Images

FLO4628850: King Alexander palm Archontophoenix alexandrae (Ptychosperma alexandrae). Lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1845. / Bridgeman Images

FLO4628866: Roseleaf bramble or West Indian raspberry, Rubus rosifolius (Rubus rosaefolius flore simplici). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

FLO4628887: Opal flower, Lachenalia aloides var. aloides (Lachenalia luteola). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1870. / Bridgeman Images

FLO4628985: Gloxinia variety, snow violet, Sinningia speciosa. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

FLO4629020: Achimenantha x naegelioides, pink and gold cultivar. Plectopoma naegelioides aureo-roseum. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

PIX4629054: Sunset and turbulence - Sunset with strong turbulence - Sunset on the Eckmuehl Lighthouse (Penmarc'h, Finistere) photograph on March 18, 2005. March 20, 2005 was the day of the Spring equinox, when the Sun sets exactly to the west. Sunset on the lighthouse of Eckmuehl (Penmarc'h, Finistere) on March 18, 2005. On March 20, 2005 was the spring equinox, moment where the sun is setting exactly towards the west / Bridgeman Images

FLO4629074: Prestonia quinquangularis foliage (Haemadictyon nutans var. maxima an sp. nova). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

FLO4629078: Big-leaf hydrangea, Hydrangea macrophylla (Hydrangea stellata). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1870. / Bridgeman Images

FLO4629087: Basket grass, Oplismenus hirtellus (Oplismenus imbecillis fol. var. panicum variegatum). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

FLO4629161: Smithiantha cinnabarina or Smithiantha fulgida (Naegelia fulgida bicolor). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

FLO4629223: Seersucker plant, Geogenanthus poeppigii (Dichorisandra undata). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

PIX4629226: Le Soleil - Fresco - 24 - Montferrand - du - Perigord - Church of St. Christopher, 14th century fresco: sunei / Bridgeman Images

FLO4629274: Goodyera biflora orchid or beni shusuran (Goodyera macrantha foliis luteo-marginatis). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

FLO4629288: Goodyera biflora orchid or beni shusuran (Goodyera macrantha foliis luteo-marginatis), and Goodyera velutina orchid, shusuran. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

PIX4629290: The Sun and the Stars - 63 - BESSE - EN - CHANDESSE - Church of Saint - Andre, crossover of the choir, Romanesque sculpture 12th century: THE SUN AND THE STOILE / Bridgeman Images

FLO4629309: Boxelder maple, Acer negundo (Negundo aceroides foliis albo-variegatis). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

PIX4629367: Le Soleil vu en coupe - Sun cutaway - Cutaway of the sun / Bridgeman Images

FLO4629396: European plant hunters attacked by natives of South Africa in the mid-19th century. Woodblock engraving from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1851. / Bridgeman Images

PIX4629399: Kepler's Law - Illustration - The segment that connects the planet to the Sun sweeps equal areas in equal times. In other words, the speed of a planet becomes greater when the planet approaches the Sun. It is maximum in the vicinity of the shortest radius (perihelie), and minimal in the vicinity of the largest radius (aphelie). Second Kepler's law, the line joining a planet and the Sun sweeps out equal areas during equal intervals of time. The planet moves faster near the Sun, so the same area is swept out in a given time as at larger distances, where the planet moves more slowl / Bridgeman Images

PIX4629421: Geocentric System of Ptolemee - Ptolemaic Cosmology - Engraving from “Harmonia Macrocosmica” by Andreas Cellarius, 1708. The planisphere of Ptolemy, or the mechanism of the heavenly orbits following the hypothesis of Ptolemy laid out in a planar view. Plate of the Harmonia Macrocosmica of Andreas Cellarius, 1708 / Bridgeman Images

FLO4629449: Blue lotus, Nymphaea nouchali var. caerulea (Nymphaea caerulea). Handcoloured lithograph by Stroobant from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1851. / Bridgeman Images

FLO4629461: Veitch's masdevallia orchid or king of the masdevallias. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1867-1868. / Bridgeman Images

FLO4629507: Darwin's barberry, Berberis darwinii. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1851. / Bridgeman Images

FLO4626350: Spring snowflake, Leucojum vernum. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1856. / Bridgeman Images

FLO4626351: Cardinal larkspur, Delphinium cardinal. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1856. / Bridgeman Images

PIX4626356: Saturn from his satellite Rhea - Saturn from his satellite Rhe, Dixon, Don (b.1951) / Bridgeman Images

FLO4626391: Keys' rhododendron, Rhododendron keysii. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1856. / Bridgeman Images

FLO4626424: Annual chrysanthemum or tricolor daisy, Ismelia carinata (Chrysanthemum carinatum). Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1856. / Bridgeman Images

FLO4626450: Large-flowered cypripedium orchid, Cypripedium macranthos. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1856. / Bridgeman Images

FLO4626455: Sticky tobacco, Nicotiana glutinosa. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1856. / Bridgeman Images

FLO4626456: Goat-leaf honeysuckle or Italian honeysuckle, Lonicera caprifolium major. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1856. / Bridgeman Images

PIX4626499: Crab Nebula seen in different wavelength - The Crab Nebula in multi wavelength: M1, the Crab Nebula, is the rest of a supernova that exploded on July 4, 1054. It is located about 6500 light years from Earth in the constellation Taurus. At the heart of this nebula is a pulsar. To obtain this photo, different observatories and telescopes combined their observations; the VLA provided the radio image (in red), the Spitzer telescope the infrared image (in yellow), the Hubble telescope for the visible part (here in green), XMM-Newton the ultraviolet image (in blue) and the Chandra telescope for X-ray data (purple). The pulsar is the bright spot in the center of the image. The unusual image was produced by combining data from telescopes spanning almost the entire electromagnetic spectrum, from radio waves to X-rays. The Karl G. Jansky Very Large Array (VLA) provided information about the nebula gathered in the radio regime (colored in red). Nasa's Spitzer Space Telescope took images in the infrared (yellow). The NASA/ESA Hubble Space Telescope provided the images made in optical wavelengths (colored in green). ESA's XMM-Newton telescope observed the Crab Nebula in the ultraviolet (blue) and Nasa's Chandra X-ray Observatory provided the data for X-ray radiation (purple). The Crab Nebula, located 6500 light-years from Earth in the constellation of Taurus, is the result of a supernova explosion which was observed by Chinese and other astronomers in 1054. At its centre is a pulsar: a super-dense neutron star, spinning once every 33 milliseconds, shooting out rotating light-like beams of radio waves and visible light. Surrounding the pulsar lies a mix of material; some of it was originally expelled from the star before it went supernova, and the rest was ejected during the explosion itself. Fast-moving winds of particles fly off from the neutron star, energising the dust and gas around it. / Bridgeman Images

FLO4626503: Japanese clematis or kazaguruma, Clematis patens. Handcoloured lithograph from Louis van Houtte and Charles Lemaire's Flowers of the Gardens and Hothouses of Europe, Flore des Serres et des Jardins de l'Europe, Ghent, Belgium, 1856. / Bridgeman Images