Density Collection

MAP microwave background
Cosmic microwave background. Whole sky image of the cosmic microwave background made by the MAP (Microwave Anisotropy Probe) spacecraft

UK at night from space
UK at night, as seen from the International Space Station (ISS). City lights (yellow) show areas of dense population. France is at bottom. Image taken on 24th December 2010

Europe at night, satellite image. City lights (yellow) show areas of dense population. There are few lights in North Africa (bottom) and the Arctic (top) since they are more sparsely populated

North America at night, satellite image
Africa at night. Satellite image of the Earth at night, set against a background of stars, centred on the continent of Africa. North is at top. City lights (yellow) show areas of dense population

Choi Hung Estate, one of the oldest public housing estates in Hong Kong, Wong Tai Sin District, Kowloon, Hong Kong, China

South America at night, satellite image
South America at night. Satellite image of the Earth at night, set against a background of stars, centred on the continent of South America. North is at top

South America at night, satellite image. City lights (yellow) show areas of dense population, particularly in North America (top left) and South Americas coasts

North America at night, satellite image. City lights (yellow) show areas of dense population, particularly in North America (upper centre)

Americas, South America, Ecuador, Quito. At over 9, 000 feet in elevation, the capitol of Ecuador
Ecuador, Quito. At over 9, 000 feet in elevation Quito sits in a valley surrounded by the Andes mountains, providing countless scenic vistas. Quito was the first established UNESCO World Heritage site

Southeast Asia at night, satellite image
Southeast Asia at night. Satellite image of the Earth seen at 18:00 (6pm) GMT (UCT), centred on China. City lights (yellow) show areas of dense population, particularly in India (left)

Italy at night, ISS image
Italy at night. International Space Station (ISS) image of Italy (centre) and the Adriatic coast (right) at night. The island of Sicily is at centre left

Africa, night-day satellite image. This composite image of the Earth is set against a background of stars, and is centred on the continent of Africa. North is at top

Whole Earth at night, satellite image. This map is centred on the Greenwich meridian, at zero degrees latitude. City lights (yellow) show areas of dense population

Equal volumes of different materials. From left to right are blocks of brass, balsa wood and polystyrene. Although they are the same size

Australia at night, satellite image. City lights (yellow) show areas of more dense population, particularly in Southeast Asia (top left) and on Australias east coast

Hydrometers and Hygrometers C017 / 3433
Plate from 18th century encyclopedia showing illustrations of hydrometers and hygrometers. A hydrometer is an instrument used to measure the specific gravity (or relative density)

Oil and water, high-speed image
Oil and water. High-speed photograph of oil being poured onto water. Since oil and water are immiscible liquids (they cannot be mixed)

Skyscrapers in central Hong Kong seen from The Peak at dawn, Hong Kong Island, Hong Kong, China

Population of New Spain, 1885
2902263 Population of New Spain, 1885; (add.info.: Population Bar Map. Printed in Spanish.); Buyenlarge Archive/UIG.

Rand, McNally & Co.'s map of the United States showing, in six degrees the density of pop... 1890
Rand, McNally & Co.'s map of the United States showing, in six degrees the density of population, 1890, (1892). This map, published in 1892 by the Chicago-based Rand McNally and Company

Apartment blocks at dusk, Kowloon, Hong Kong

A woman carrying an umbrella is silhouetted from behind a window covered with rain drops during wet weather in Colombo April 29, 2014

Public housing apartment block towers in Tseung Kwan O, Sai Kung District, New Territories, Hong Kong, China

Skyscrapers in central Hong Kong seen from Victoria Peak at sunrise, Hong Kong Island, Hong Kong, China

Tokyo. Cityscape image of Tokyo skyline during sunny day in Japan

Seoul. Image of Seoul downtown during twilight blue hour

Population density in Europe in 19th century
Illustration of a Population density in Europe in 19th century

Apartment blocks at night, Kowloon, Hong Kong

General view of the residential area is pictured during dusk at Jodhpur in Rajasthan
A general view of the residential area is pictured during dusk at Jodhpur in Rajasthan, April 5, 2015. Jodhpur, also known as the blue city in the desert Indian state of Rajasthan

View of the old quarter of Sanaa
A view of the old quarter of Sanaa, Yemen August 6, 2018. Picture taken August 6, 2018. REUTERS/Khaled Abdullah

Migrating starlings fly in formation across the sky near the southern Israeli town of Rahat February 2, 2015. The phenomenon known murmuration is most common during the winter months

Office and residential buildings are silhouetted in the dusk from the observation deck of Tokyo Skytree, the worlds tallest broadcasting tower, in Tokyo, Japan June 18, 2019. REUTERS/Issei Kato

Thousands of starlings fly over marshes as they return to roost at dusk near Glastonbury in Somerset, south west England, January 14, 2015

Office and residential buildings are seen from the observation deck of Tokyo Skytree in
Office and residential buildings are seen from the observation deck of Tokyo Skytree, the worlds tallest broadcasting tower, in Tokyo, Japan June 18, 2019. REUTERS/Issei Kato

Apartment block towers in Tin Shui Wai, Yuen Long District, New Territories, Hong Kong, China

Highrise apartment block towers in Kowloon Bay, Kwun Tong District, New Territories, Hong Kong, China

Shek Kip Mei Estate public housing apartment block towers, Shek Kip Mei, Kowloon, Hong Kong, China

Public housing apartment block towers in Kowloon Bay, Kwun Tong District, New Territories, Hong Kong, China

Skyscrapers in central Hong Kong, Admiralty and Mong Kok seen from The Peak at sunrise, Hong Kong Island, Hong Kong, China

DDE-90032459
View of Lucca from Torre Guinigi, Lucca, Tuscany, Italy, Europe Date: 10/02/2006

DDE-90032031
View of Florence, Italy from Piazza Michelangelo. Date: 11/11/2005

DDE-90032030
Panoramic view of Florence, Italy along the Arno River and Ponte Vecchio (Old Bridge). Date: 11/11/2005

DDE-90024284
Elevated view of city, Udaipur, India Date: 11/11/2005

DDE-90024256
Air pollution, New Delhi, India Date: 11/11/2005

DDE-90020446
Kenya, Lake Nakuru National Park, Lesser Flamingoes (Phoeniconaias minor) flock in Lake Nakuru Date: 19/02/2005

Grassy plants and a log in a field in summer, Lower Yukon River, Mountain Village, Alaska, USA
Close-up of wild, green grassy plants in a field with an old fallen tree log in the middle in Summer, Lower Yukon River; Mountain Village, Western Alaska, Alaska, United States of America

Parco del Lavino, Pescara
A heart in the water of Parco del Lavino protected nature reserve. The water is sulfurous and glows a lovely pale blue

British Isles, Comparative valuation of lands according to rental, 1904, Comparative density of population
3648579 British Isles, Comparative valuation of lands according to rental, 1904, Comparative density of population, 1901 (colour litho) by English School

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"Density: A Tapestry of Lights and Shadows" From the mesmerizing patterns of the cosmic microwave background (CMB) map to the captivating view of the UK at night from space, our planet's density reveals itself in a myriad of ways. The North America satellite image showcases bustling cities illuminated like constellations against a dark canvas, while Choi Hung Estate stands as a testament to Hong Kong's dense urban landscape. As we shift our gaze towards Europe at night, another tapestry unfolds before us - an intricate web of lights that signifies human presence and activity. South America emerges with its own unique charm under the cloak of darkness, showcasing vibrant cities glowing brightly amidst vast expanses. Meanwhile, Ecuador's capital city Quito perches high above sea level, reminding us how they are take on new dimensions even at great heights. Venturing further into Southeast Asia through a satellite lens, we witness yet another spectacle as countless points of light dot the landscape during nighttime hours. Italy enchants us with its romantic allure when viewed from aboard the International Space Station (ISS), where densely populated areas shine like beacons against an otherwise tranquil backdrop. But density is not limited to artificial illumination alone; Africa unveils its true nature through contrasting patches of light and darkness captured by satellites transitioning between day and night. It serves as a reminder that density encompasses both human settlements and untamed wilderness coexisting harmoniously on this diverse continent. In these snapshots taken from space or meticulously crafted maps, we are reminded that density is more than just numbers or statistics - it is an intricate dance between humanity and geography. These glimpses into different corners of our world showcase how populations gather together in various forms across continents – whether it be towering skyscrapers or remote villages nestled within vast landscapes. Through these images, we come to appreciate both the beauty and complexity inherent in our planet's density – a constant reminder that despite our differences and distances apart, we are all interconnected in this vast tapestry of lights and shadows.