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1
My Shanty, Lake George
My Shanty, Lake George
is a 1922 painting by Georgia O'Keeffe. From 1918 to 1934, Georgia O'Keeffe spent part of the year at Alfred Stieglitz's family estate in Lake George. The depicted shanty was O'Keeffe's studio, which was painted in subdued tones in response to criticism from Stieglitz' circle—Arthur Dove, John Marin, Charles Demuth, Marsden Hartley, and Paul Strand. O'Keeffe said of the painting: "The clean, clear colors were in my head, but one day as I looked at the brown burned wood of the Shanty I thought, "I can paint one of those dismal-colored paintings like the men. I think just for fun I will try—all low-toned and dreary with the tree beside the door."
My Shanty
was the first painting by O'Keeffe purchased by Duncan Phillips.




2
Composition with Red Blue and Yellow
Composition II with Red Blue and Yellow
is a 1930 painting by Piet Mondrian. A well-known work of art, Mondrian contributes to the abstract visual language in a large way despite using a relatively small canvas. Thick, black brushwork defines the borders of the different geometric figures. Comparably, the black brushwork on the canvas is minimal but it is masterfully applied to become one of the defining features of the work.





3
Self-Portrait with Thorn Necklace and Hummingbird
Self-Portrait with Thorn Necklace and Hummingbird
(
Autorretrato con Collar de Espinas
) is a 1940 painting by Mexican painter Frida Kahlo.

Kahlo painted the self-portrait, which includes a black cat and a monkey, after her divorce from Diego Rivera and the end of her affair with photographer Nickolas Muray. Muray bought the portrait shortly after it was painted, and it is currently part of the Nickolas Muray collection at the Harry Ransom Center at the University of Texas at Austin.




4
Nebula
A
nebula
(Latin for 'cloud' or 'fog'; pl.
nebulae
,
nebulæ
or
nebulas
) is an interstellar cloud of dust, hydrogen, helium and other ionized gases. Originally, the term was used to describe any diffused astronomical object, including galaxies beyond the Milky Way. The Andromeda Galaxy, for instance, was once referred to as the
Andromeda Nebula
(and spiral galaxies in general as "spiral nebulae") before the true nature of galaxies was confirmed in the early 20th century by Vesto Slipher, Edwin Hubble and others. Edwin Hubble discovered that most nebulae are associated by stars and illuminated by starlight. He also helped categorize nebulae based on the type of light spectra they produced.
Most nebulae are of vast size; some are hundreds of light-years in diameter. A nebula that is visible to the human eye from Earth would appear larger, but no brighter, from close by. The Orion Nebula, the brightest nebula in the sky and occupying an area twice the angular diameter of the full Moon, can be viewed with the naked eye but was missed by early astronomers. Although denser than the space surrounding them, most nebulae are far less dense than any vacuum created on Earth – a nebular cloud the size of the Earth would have a total mass of only a few kilograms. Many nebulae are visible due to fluorescence caused by embedded hot stars, while others are so diffused that they can be detected only with long exposures and special filters. Some nebulae are variably illuminated by T Tauri variable stars.
Nebulae are often star-forming regions, such as in the "Pillars of Creation" in the Eagle Nebula. In these regions, the formations of gas, dust, and other materials "clump" together to form denser regions, which attract further matter, and eventually will become dense enough to form stars. The remaining material is then believed to form planets and other planetary system objects.





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