Related Experiment Video
Updated: Aug 7, 2026

Whole-Body Nanoparticle Aerosol Inhalation Exposures
Published on: May 7, 2013
A galactic chimney in the Perseus arm of the Milky Way
M Normandeau1, A R Taylor, P E Dewdney
1Department of Physics and Astronomy, University of Calgary, Alberta, Canada.
Abstract:
Galaxies are surrounded by large haloes of hot gas which must be replenished as the gas cools. This has led to the concept of galactic 'chimneys'--cavities in the interstellar medium, created by multiple supernova explosions, that can act as conduits for the efficient transport of hot gas from a galaxy's disk to its halo. Here we present a high-resolution map of atomic hydrogen in the Perseus arm of our galaxy, which shows clear evidence for the existence of such a chimney. This chimney appears to have been formed by the energetic winds from a cluster of young massive stars, and may currently have reached the stage of bowing out into the halo.
Related Concept Videos
Emission Spectra
Mass Spectrum
Rocket Propulsion In Empty Space - II
Detection of Black Holes
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Transformers in Distribution System
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
Planes in Space

