Lost Astronaut

oktober 26th, 2010

Alicia Framis
Lost Astronaut, 2009

alicia framis

alicia framis

alicia framis

Turning The World Inside Out

oktober 19th, 2010

Anish Kapoor
Marsupial, 2006

anish kapoor

Anish Kapoor is renowned for his enigmatic sculptural forms that permeate physical and psychological space. Most often, the intention is to engage the viewer, producing awe through their size and simple beauty, evoking mystery through the works’ dark cavities, tactility through their inviting surfaces, and fascination through their reflective facades. Throughout, he has explored what he sees as deep-rooted metaphysical polarities: presence and absence, being and non-being, place and non-place and the solid and the intangible. His most recent works are mirror-like, reflecting or distorting the viewer and surroundings.

Iris, 1998

anish kapoor

Turning the World Inside Out II, 1995

anish kapoor

Dark Matter MACHO

oktober 18th, 2010

gravitational lensing

In general relativity, the presence of matter (energy density) can curve spacetime, and the path of a light ray will be deflected as a result. This process is called gravitational lensing and in many cases can be described in analogy to the deflection of light by (e.g. glass) lenses in optics. Lensing measures all the mass, in particular the dark matter as well as the luminous matter.

There are ongoing searches to use lensing to find a type of dark matter called MACHOs (massive compact halo objects). Although MACHOs, as dark matter, cannot be seen themselves, if they pass in front of a source (e.g. a star nearby), they can cause the star to become brighter for a while, e.g. days or weeks. This effect has been observed but determinations of the dark matter are not yet conclusive.

Based on a text by Joanne Cohn.

dark halo

Artist's impression showing the approximate extent of the dark matter halo 
around a large spiral galaxy such as our own (Credit: Jose Wudka)

dark matter

3D map of the universe's dark matter (Credit: NASA, ESA and R. Massey)

gravitational lensing

Gravitational lensing caused by dark matter (Credit: NASA)

Dennis Feddersen
Dark Matter #02, 2009

dennis feddersen dark matter

The works of Dennis Feddersen truly occupy space. He experiments with different types of materials. Flexibility is one of the most important criteria for his choice of materials, thus emphasizing the possibilities that may arise during the creative process. He constantly adjusts his flexible sculptures in a series of trials: i.e. he reacts to the surrounding architecture and adapts his sculptures accordingly.

Check this illuminating video about dark matter and gravitational lensing.