CUB4485350: Walther von der Vogelweide monument, Bolzano, Trentino Alto Adige, Italy / Bridgeman Images

CUB4476294: Center of the city, Pesaro, Marche, Italy / Bridgeman Images

CUB4476399: Villa Puccini, Viareggio, Tuscany, Italy / Bridgeman Images

CUB4476436: Teatro Verdi, Busseto, Parma, Emilia-Romagna, Italy / Bridgeman Images

CUB4476509: House of Donizetti, Bergamo, Lombardy, Italy / Bridgeman Images

CUB4476518: Via Donizetti, Bergamo, Lombardy, Italy / Bridgeman Images

CUB4476530: Cappella Colleoni, Bergamo, Lombardy, Italy / Bridgeman Images

CUB4476545: Torre Civica, Bergamo, Lombardy, Italy / Bridgeman Images

CUB4491112: Old town centre, Toirano, Ligury, Italy / Bridgeman Images

CUB4491133: Square, Varazze, Ligury, Italy / Bridgeman Images

CUB4491166: Bacteria colors, Yellowstone National Park, United States of America / Bridgeman Images

CUB4491265: Old Faithful Geyser, Yellowstone National Park, United States of America, America / Bridgeman Images

CUB4491277: Old Faithful Inn, Yellowstone National Park, United States of America, America / Bridgeman Images

CUB4491289: Grand Canyon, Lower Falls, Yellowstone National Park, United States of America / Bridgeman Images

CUB4491301: Grand Canyon, Lower Falls, Yellowstone National Park, United States of America / Bridgeman Images

CUB4491394: Varan, Sonora Desert museum, Arizona, United States of America, North America / Bridgeman Images

CUB4485377: Foreshortening, Ortisei, Trentino Alto Adige, Italy / Bridgeman Images

CUB4485416: Memorial Stupa, Timphu, Kingdom of Bhutan, People's Republic of China, South Asia, Asia / Bridgeman Images

CUB4485422: The Valley, Timphu, Kingdom of Bhutan, People's Republic of China, South Asia, Asia / Bridgeman Images

CUB4485479: The people, Kingdom of Bhutan, People's Republic of China, South Asia, Asia / Bridgeman Images

CUB4485575: Navelli, Abruzzo, Italy, women in a crocus field / Bridgeman Images

CUB4477155: Alessandro Manzoni house, Belgium square, Milan, Lombardy, Italy / Bridgeman Images

CUB4486301: Centre of the city, Verona, Veneto, Italy / Bridgeman Images

CUB4474783: White grapes, Mania, Liguria, Italy / Bridgeman Images

CUB4474888: Saltworks, Marsala, Sicily, Italy / Bridgeman Images

CUB4489684: Suburb covered with snow, Boccadasse, Genoa, Ligury, Italy / Bridgeman Images

CUB4474954: Robiole, Roccaverano, Piedmont, Italy / Bridgeman Images

CUB4474963: Robiole, Roccaverano, Piedmont, Italy / Bridgeman Images

CUB4489735: Massage and mud treatment, Il Piccolo Castello wellness center, Monteriggioni, Tuscany, Italy / Bridgeman Images

CUB4474969: Robiole, Roccaverano, Piedmont, Italy / Bridgeman Images

LBY4560280: Extension of the School of Architecture and Design in Oslo (Norway), 2001. / Bridgeman Images

LBY4560386: The school city Lakanel, 3 avenue du President Franklin Roosevelt, in Sceaux (Hauts de Seine, Ile de France). Architect Anatole de Baudot, 1882-1885. / Bridgeman Images

LBY4564152: The Lyon tram, Parilly universite station, Saint Priest (Rhone). / Bridgeman Images

LBY4560405: The school city Lakanel, 3 avenue du President Franklin Roosevelt, in Sceaux (Hauts de Seine, Ile de France). Architect Anatole de Baudot, 1882-1885. / Bridgeman Images

PIX4564265: Blue stragglers in cluster 47 Toucan - Blue stragglers in globular cluster 47 Tucanae - This image obtained by the Hubble space telescope shows a detail of the 47 Toucan cluster near its center (the field is indicated on the left image taken from the ground). The yellow circles on the right image indicate the position of stars identified by the telescope as blue trainers. Because of the high density of stars within a globular cluster, a collision between two stars sometimes occurs, merging into a single young, bright and warm star called a blue straggler. The core of globular cluster 47 Tucanae is home to many blue stragglers, rejuvenated stars that glow with the blue light of young stars. A ground - based telescope image (on the left) shows the entire crowded core of 47 Tucanae, located 15,000 light - years away in the constellation Tucana. Peering into the heart of the globular cluster's bright core, the Hubble Space Telescope's Wide Field and Planetary Camera 2 separated the dense clump of stars into many individual stars (image on right). Some of these stars shine with the light of old stars; others with the blue light of blue stragglers. The yellow circles in the Hubble telescope image highlight several of the club's blue stragglers. Astronomers theorize that blue stragglers are formed either by the slow merger of stars in a double - star system or by the collision of two unrelated stars. For the blue straggler in 47 Tucanae, astronomers favor the slow merger scenario. This photo is a three - color composite of Wide Field and Planetary Camera 2 archival images taken with ultraviolet, blue, and violet filters. Green, blue, and red colors were assigned to the filters and scaled so that the red giant stars appear orange, the main sequence stars are white/green, and the blue stragglers are appropriately blue. The ultraviolet images were taken on / Bridgeman Images

PIX4564461: Globular cluster M3 in Hunting Dogs - Globular cluster M3 in Canes Venatici - This cluster contains about 500,000 stars and is located 100,000 years - light from Earth. This globular cluster is about 100,000 light - years from us and contains approximately 555,000 stars / Bridgeman Images