Irregular galaxies are further classified into two subtypes:
Irregular Galaxies (Irr I): This subtype often exhibits some structure and may contain older stars along with regions of ongoing star formation.
Irregular Galaxies (Irr II): This subtype typically lacks any organized structure and contains mostly young, hot stars along with significant amounts of gas and dust.
The irregular shape of these galaxies is often attributed to disruptive gravitational interactions with other galaxies. They may have been formed as a result of galactic collisions or gravitational disturbances, leading to their irregular appearance.
Irregular galaxies can be observed using telescopes equipped with high-resolution imaging capabilities. Observing the distribution of stars, gas, and dust within these galaxies can provide valuable insights into their formation and evolution.
Study Tips
When studying irregular galaxies, it's important to focus on the following key points:
Understand the defining characteristics of irregular galaxies, including their lack of symmetrical structure and the presence of ongoing star formation.
Differentiate between Irr I and Irr II subtypes based on their structural features and stellar populations.
Explore the possible mechanisms that lead to the irregular shapes of these galaxies, such as gravitational interactions and disturbances.
Consider the implications of observing irregular galaxies in relation to our understanding of galactic evolution and the broader structure of the universe.
Energy - A. Energy is involved in all physical and chemical processes. It is conserved, and can be transformed from one form to another and into work. At the atomic and nuclear levels energy is not continuous but exists in discrete amounts. Energy and mass are related through Einstein's equation E=mc 2 . B. The properties of atomic nuclei are responsible for energy-related phenomena such as radioactivity, fission and fusion. C. Changes in entropy and energy that accompany chemical reactions influence reaction paths. Chemical reactions result in the release or absorption of energy. D. The theory of electromagnetism explains that electricity and magnetism are closely related. Electric charges are the source of electric fields. Moving charges generate magnetic fields. E. Waves are the propagation of a disturbance. They transport energy and momentum but do not transport matter.
Relate temperature to the average molecular kinetic energy.