The Two Eyes of the Earth: Art and Ritual of Kingship between Rome and Sasanian Iran by Matthew P. Canepa

2011 ◽  
Vol 11 (1) ◽  
pp. 139-142
Author(s):  
Marica Cassis
Keyword(s):  
2020 ◽  
Vol 7 (3) ◽  
pp. 273-294
Author(s):  
Joanna Page

A growing number of transdisciplinary art-science projects across the world are taking up the challenge of representing geological and cosmic time and of rendering visible, audible and tangible the powerful forces that shape the planet’s systems. While art historians have often found the earth art movement to exemplify a new awareness of the geological impact of human activity on the planet, I argue that art may engender a more genuinely planetary perspective when it pays attention to those forces we cannot compel. Gesturing towards the limits of human agency with regard to the Earth may ultimately be a more effective way of challenging anthropocentrism, and of locating human history within planetary time. My analysis draws on works by four contemporary artists – Rafael Lozano-Hemmer (Canada/Mexico), Claudia Müller (Chile), Paul Rosero Contreras (Ecuador) and Michelle-Marie Letelier (Germany/Chile) – that explore the science of turbulent dynamics that are impervious to human action, such as solar flares, earthquakes, winds, tides, tsunamis and volcanic eruptions. As Nigel Clark argues, the fundamental asymmetry that governs our relationship with a volatile planet is often lost in accounts of the entanglement of human and nonhumans that have recently prevailed in the humanities and social sciences. The works I discuss revise the practices of earth art to create a ‘planetary art’, cultivating a sense of the planet beyond the human that allows us to understand its dynamics more fully, and to resituate human agency more properly within geohistories of matter and energy. In many cases, this art remains fully alert to the geopolitics of the Anthropocene, focusing on the increased vulnerability of the Global South to climate change and environmental disaster, and gesturing towards a decolonial critique of the objectification of nature and the dissociative, rationalist knowledge produced by modern science.


Leonardo ◽  
1993 ◽  
Vol 26 (5) ◽  
pp. 371 ◽  
Author(s):  
Helen Mayer Harrison ◽  
Newton Harrison

1966 ◽  
Vol 25 ◽  
pp. 373
Author(s):  
Y. Kozai

The motion of an artificial satellite around the Moon is much more complicated than that around the Earth, since the shape of the Moon is a triaxial ellipsoid and the effect of the Earth on the motion is very important even for a very close satellite.The differential equations of motion of the satellite are written in canonical form of three degrees of freedom with time depending Hamiltonian. By eliminating short-periodic terms depending on the mean longitude of the satellite and by assuming that the Earth is moving on the lunar equator, however, the equations are reduced to those of two degrees of freedom with an energy integral.Since the mean motion of the Earth around the Moon is more rapid than the secular motion of the argument of pericentre of the satellite by a factor of one order, the terms depending on the longitude of the Earth can be eliminated, and the degree of freedom is reduced to one.Then the motion can be discussed by drawing equi-energy curves in two-dimensional space. According to these figures satellites with high inclination have large possibilities of falling down to the lunar surface even if the initial eccentricities are very small.The principal properties of the motion are not changed even if plausible values ofJ3andJ4of the Moon are included.This paper has been published in Publ. astr. Soc.Japan15, 301, 1963.


1962 ◽  
Vol 14 ◽  
pp. 415-418
Author(s):  
K. P. Stanyukovich ◽  
V. A. Bronshten

The phenomena accompanying the impact of large meteorites on the surface of the Moon or of the Earth can be examined on the basis of the theory of explosive phenomena if we assume that, instead of an exploding meteorite moving inside the rock, we have an explosive charge (equivalent in energy), situated at a certain distance under the surface.


Sign in / Sign up

Export Citation Format

Share Document