PIX4569327: Sundial - Invalides - Paris - Sundial in Paris - Hotel des Invalides: The sundials of the western facade of the monument of the Hotel des Invalides. In the court of honour, the hour was given on each facade: to the north, by a clock and on the other three facades, by seven solar dials. If the clock is missing, the dials are still visible / Bridgeman Images

PIX4569354: La Meridienne de la Pitie-Salpetriere - Paris - Sundial in Paris - Hospital de la Pitie-Salpetiere: Outside the chapel of the Pitie-Salpetiere Hospital (75013), a Meridian is visible just above the door. It has the motto: Ultima Latet (the last one is hidden). This simple Meridian features the 11 am, 12 pm and 1 pm hour lines, plus the half-hours on either side of noon. Portions of daytime arches are traced and marked by the signs of the Zodiac / Bridgeman Images

LRI4569802: Aerial view of La Boca district and Riachuelo river (photography, 1983) / Bridgeman Images

PIX4569863: Comete Hale - Bopp - Comet Hale - Bopp - Comete Hale - Bopp seen above rocks in April 1997. Comet Hale - Bopp above rocks. April 199 / Bridgeman Images

LRI4569957: Aerial view of Nazca Lines representing a bird figure (photography, 1983) / Bridgeman Images

PIX4570001: Halley Comet - Halley Comet on April 9 - 10, 1986 - Halley Comet on April 9 - 10, 1986 / Bridgeman Images

LRI4570029: View of Chachani mount and Misti volcano (photography, 1983) / Bridgeman Images

PIX4570053: Comete Hyakutake 25/03/1996 - Comet Hyakutake March 25 199 / Bridgeman Images

PIX4570067: Comete Hyakutake and Big Bear - Comet Hyakutake and Big Dipper March 25 199 / Bridgeman Images

PIX4570101: Comete Hyakutake - Comet Hyakutake - Comete Hyakutake March 1996. This is the spectacular Comet Hyakutake as it passed closest to Earth in March of 1996. The solid portion or nucleus of a comet is made up of ice, frozen gases, dust and small rock. And it is relatively small - less than 15 miles in diameter. As its orbit takes it closer to the sun, this frozen mass begins to melt and a coma, which is a gaseous cloud, develops around the nucleus. This coma can grow to be tens of thousands of miles in diameter. Finally a tail also develops which can become millions of miles long. This color photo reveals the blue - green glow around the coma, the yellow - red shroud of a dust tail, and the many long blue streamers of the ion tail / Bridgeman Images

TEC4571679: Galerie Vivienne in Paris 2nd arrondissement. Construction 1823-1826, architect Jacques Delannoy. / Bridgeman Images

TEC4569555: Saint Paul de Vence (Maritime Alps) / Bridgeman Images

PIX4569581: Comete Hale - Bopp - Comet Hale - Bopp C/1995 Feb 16 1997 - Comet Hale - Bopp C/1995 O1 9:58 UT 16 February 199 / Bridgeman Images

LRI4569608: Aerial view of Santa Fe province, Parana river and industrial zone (photography, 1983) / Bridgeman Images

PIX4569748: Comete Hale - Bopp - March 1997 - Comet Hale - Bopp in March 199 / Bridgeman Images

EPA4570132: Place Jacques Duclos in Montreuil (Seine Saint Denis) / Bridgeman Images

PIX4570491: Comete McNaught (C/2006 P1) - Comete McNaught (C/2006 P1) - View of Comete McNaught obtained on January 18, 2007 from New Zealand - Zelande.Tuki Tuki, North Island, New Zealand. Tuki Tuki, North Island, New Zealand, 18 Jan 2007 / Bridgeman Images

TEC4569894: Cefalu in Sicily (Italy). / Bridgeman Images

PIX4570118: Comete Hyakutake - Comet Hyakutake - View on March 18, 1996 / Bridgeman Images

TEC4571903: Villa Louvat, rue Bouchard in Paris 14th arrondissement. / Bridgeman Images

TEC4572042: Villa Adrienne, 19 avenue du General Leclerc in Paris. Set up in 1780, this villa was originally intended to receive military and ecclesiastic. / Bridgeman Images

PIX4570574: The McNaught Comet at the Paranal Observatory - Comet McNaught over Paranal Observatory - View of the McNaught Comet obtained on January 19, 2007 above the VLT in Chile. Comet McNaught (C/2006 P1) as seen over Very Large Telescope, Chile, on January 19 2007 / Bridgeman Images

PIX4570772: Comete McNaught 01/2007 - Comet McNaught 01/2007 - View of the McNaught comet obtained on January 19, 2007 from Australia. Chiro Observatory - Western Australia. Comet McNaught as seen from Chiro Observatory, W. Australia. Jan 19 2007 / Bridgeman Images

PIX4570920: Comete 17P/Holmes 29/10/2007 - Comet 17P/Holmes October 29 2007 - On October 24, 2007, Comete 17P/Holmes suddenly increased luminosite and became visible to the naked eye. In this image obtained a few days later in France, the comete is visible near the constellation of Persee (in the center of the image). In late October 2007, Comet Holmes amazingly brightened 15 magnitude (about million times). On October 29, Holmes is easily visible in the sky in the center of image / Bridgeman Images

EPA4570179: The corner of rue Etienne Marcel and rue Parmentier in Montreuil (Seine Saint Denis) / Bridgeman Images

LRI4570268: Aerial view of the city (photography, 1994) / Bridgeman Images

LBY4570401: The banks of the Seine to Saint Ouen (Seine Saint Denis) / Bridgeman Images

PIX4570453: Comete McNaught (C/2006 P1) - View of the McNaught comet obtained on January 9, 2007 at the end of the day from Mont - Aigoual, 1,300 m altitude, France. Comet McNaught (C/2006 P1) seen at twilight from Mont - Aigoual (1,300 meters), France. January 09 2007 / Bridgeman Images

TEC4572160: Villa Guggenbuhl (villa built for the painter Walter Guggenbuhl), 14 rue Nansouty, seen from Parc Monsouris, in Paris. Construction 1926-1927, architect Andre Lurcat (1894-1970). / Bridgeman Images

TEC4572185: Studio house of the painter Pierre Bertrand (1884-1975) in Villa Seurat in Paris. Construction 1925, architect Andre Lurcat (1894-1970). Impasse privee lotie dans les annees vingt pour recevoir des villas d'artistes close to Montparnasse.Photography 10/05/88. / Bridgeman Images

TEC4572189: Villa Quille, designed for sculptor Arnold Huggler (1894-1988), from Villa Seurat in Paris. Construction 1925, architect Andre Lurcat (1894-1970). Impasse privee lotie in the twenty years to receive villas of artists close to Montparnasse. Photography 10/05/88. / Bridgeman Images

TEC4572298: The Atlantic Garden in Paris. Photography 10/04/98. / Bridgeman Images

PIX4572495: Different types of brown dwarves - Artist's view - Different types of brown dwarves. Artwork - From left to right: brown dwarf type M, the youngest and most massive, temperature between 200 and 3000 degres Kelvin; brown dwarf type L, between 1500 and 2000 degres Kelvin; brown dwarf type T, between 1200 and 1500 degres Kelvin; brown dwarf type T but colder, from 1200 to 600 degres Kelvin; brown dwarf type still indefinite, less than 600 degres Kelvin; finally, on the right, Jupiter for size comparison. From left to right: a brown dwarf of type M (the youngest and most massive brown dwarves), a brown dwarf of type L, then a type T, another type T but colder, then another brown dwarf with a type unidentified yet which is colder, at last Jupiter for comparison / Bridgeman Images

PIX4572541: Brown dwarf & debris ring from an oblique perspective - Artist's view of a brown dwarf star about 60 times the mass of Jupiter, surrounded by a disc of dust and rocks. In the foreground, a primitive exoplanet enlighted by the star. A small, barren planet orbits obliquely to the plane of a massive set of concentric dust rings surrounding a brown dwarf of about 60 Jupiter masses. These rings are evocative of Saturn's famous rings of rock and ice, however there is likely no ice in the rings around this dwarf. Recent observations have revealed that some brown dwarfs may be surrounded by rings of dust. While the origin of these rings, and the brown dwarfs themselves, is unclear, it's thought that material from these rings may even coalesce into planets, providing some brown dwarfs with their own solar systems / Bridgeman Images

PIX4571099: Comet Lulin (C2007/N3) - View of Comet Lulin (C2007/N3), February 21, 2009. Comet Lulin (C/2007 N3) on February 21, 2009 from 05:41 UT to 06:20 UT. The faint blue ion tail is seen to the upper right, and the anti - tail stretches to the lower left. Composite of 19 two - minute exposures that has been enhanced in Photoshop to bring out faint details in the tails / Bridgeman Images

PIX4571179: Comet C/2009 P1 Garrad - September 2011 - Comet C/2009 P1 Garrad seen near the Hanger cluster (or Brocchi cluster), an asterism located in the constellation Little Fox. September 4, 2011. Comet C/2009 P1 Garrad is seen in the vicinity of the Coathanger asterism, also known as Brocchi's cluster, Al Sufi's cluster or Collinder. September 4, 2011 / Bridgeman Images