Isotropic

Definition

Isotropic describes a property or phenomenon that is uniform in all directions. In astronomy, it often refers to the even distribution of galaxies and cosmic background radiation across the universe.

5 Must Know Facts For Your Next Test

1. An isotropic universe appears the same in every direction when observed on a large scale.
2. Cosmic Microwave Background Radiation is a key example of an isotropic phenomenon.
3. The assumption of isotropy simplifies mathematical models in cosmology.
4. Isotropy is closely related to the Cosmological Principle, which also includes homogeneity.
5. Deviations from isotropy can indicate the presence of large-scale structures or anisotropies in the universe.

Review Questions

• What does it mean for a property to be isotropic in astronomy?
• How does Cosmic Microwave Background Radiation demonstrate isotropy?
• Why is the assumption of isotropy important in cosmological models?

Related terms

Homogeneous:

Uniform in composition or character; for example, matter is evenly distributed throughout the universe.

Anisotropic: Having properties that vary depending on direction; opposite of isotropic.

Cosmological Principle:

The assumption that on large scales, the universe is both homogeneous and isotropic.