Arp 273 is a group of interacting galaxies, lying 300 million light years away in the constellation Andromeda and first discovered in 1966. In this photograph from the Hubble Space Telescope, the larger of the spiral galaxies, known as UGC 1810, has a disk that is tidally distorted into a rose-like shape by the gravitational tidal pull of the companion galaxy below it, known as UGC 1813. A swath of blue jewels across the top is the combined light from clusters of intensely bright and hot young blue stars.Photograph: NASA, ESA, and the Hubble Heritage Team
A depiction of the Boston Massacre, an incident on March 5, 1770, in which British Army soldiers killed five male civilians and injured six others in Boston, Massachusetts. Eight soldiers, one officer, and four civilians were arrested and charged with murder, though all but two were acquitted; two soldiers were convicted of manslaughter and sentenced to branding. During the era of discontent that led to the American Revolution, this event was used for anti-British propaganda.Engraving: Paul Revere
"Mariana" is a poem by Alfred, Lord Tennyson, published in 1830. It was inspired by William Shakespeare's Measure for Measure, though possibly drawing on influences from sources as varied as Sappho and Keats. It depicts a young woman lamenting her isolation from society, and her despair at her lover's absence, using imagery of a decaying wasteland surrounding Mariana's house to convey her emotions and isolation. The poem was well received at publication; one modern scholar described Mariana as "the most famous heroine of the 1830 volume".Photogravure illustration: W. E. F. Britten; restoration: Adam Cuerden
The Rufous-tailed Robin is a small passerine bird. It breeds in forests in the taiga of northeastern Asia and south to Mongolia, and winters in Southeast Asia and southern China; this specimen was photographed in Thailand.Photograph: JJ Harrison
Vyborg Castle is a Swedish-built medieval fortress around which the town of Vyborg evolved. Built in the 13th century, it served to defend the Swedes against Russians for over 400 years, although it is now located in the latter country. The castle currently serves as a museum.Photograph: A.Savin
An 1873 print promoting the Grange, the oldest U.S. agricultural advocacy group with a national scope. In 2005 it had 160,000 members.
The central scene shows a farmer with one foot on his shovel, captioned "I Pay for All". From left to right, the top insets show a farmer's fireside and the Grange in session; the bottom ones show a harvest dance, a broken-down cabin signposted "Ignorance" and "Sloth", and a Biblical scene of the gleanersRuth and Boaz.Poster: J. Hale Powers & Co. Fraternity & Fine Art Publishers; restoration: Trialsanderrors
The Mangrove Robin (Peneoenanthe pulverulenta) is a species of bird in the family Petroicidae which lives in the mangrove forests of Australia, Indonesia, and Papua New Guinea. These birds feed on insects, hunting those found in the mud after the tide ebbs; they may also feed on crabs.Photograph: JJ Harrison
Centaurus A, a prominent galaxy in the constellation of Centaurus, in a colour composite of images obtained with three instruments. Discovered in 1826 by James Dunlop, Centaurus A is a highly visible starburst galaxy which is only visible from low northern latitudes and the southern hemisphere.Photograph: ESO/WFI (Optical); MPIfR/ESO/APEX/A.Weiss et al. (Submillimetre); NASA/CXC/CfA/R.Kraft et al. (X-ray)
An advertisement for a 1927 enactment of the Indian rope trick by stage magician Howard Thurston. This form of stage magic is said to have been performed in and around India during the 19th century, though the factuality of this has been disputed.Poster: The Otis Lithograph Co.; Restoration: Adam Cuerden
The Lifeboat is Taken through the Dunes, painted by Michael Ancher in oils on canvas in 1883. It is representative of themes the painter often covered, fishermen and other scenes from the Danish port of Skagen.Painting: Michael Ancher
Dense fog over the Gangetic plains of the Indian Subcontinent, with the Himalayas to the north and the Bay of Bengal at bottom right, as imaged by a NASA satellite on 23 December 2012. Fog is a collection of liquid water droplets or ice crystals suspended in the air at or near the Earth's surface; it is closer to the Earth's surface than clouds and denser than mist.Photo: NASA Earth Data - LANCE Web Mapping Service, MODIS Rapid Response System
A panorama of the east face of hills showing strata from the John Day Formation in the Painted Hills Unit of the John Day Fossil Beds National Monument, in the U.S. state of Oregon. The strata, which vary in age from 18 million to 39 million years, were formed mainly from ashfalls from volcanoes to the west. The sediment layers vary in their chemical composition and color owing to the ash and other debris falling during varied climatic and volcanic conditions.Photograph: Finetooth
The Great Shearwater (Puffinus gravis) is a large shearwater in the seabird family Procellariidae which feeds on fish and squid, which it catches from the surface or by plunge-diving. It is one of the few birds which migrate from breeding grounds in the Southern Hemisphere to the Northern Hemisphere. It flies by dipping from side to side on stiff wings, the wingtips almost touching the water, with few wingbeats.Photo: JJ Harrison
Princess Ida is a comic opera with music by Arthur Sullivan and a libretto by W. S. Gilbert. First performed at the Savoy Theatre on 5 January 1884, the piece involves Prince Hilarion and his two friends sneaking into a women's college, disguised as women, to woo Princess Ida, to whom he was wed in infancy. Ida, a feminist, has rejected all mankind, and when Hilarion's identity is accidentally revealed, a battle of the sexes ensues.
This illustration is from the 1909 printing of Savoy Operas, a illustrated compilation of four of the Gilbert and Sullivan works. This illustration presents the stage direction "Enter Princess, reading."