Similar phenomena indirectly observed on stars are commonly called starspots and both light and dark spots have been measured.
In this way, dislocations in silicon, for example, can be observed indirectly using an interference microscope.
This not only alters the understanding of black holes, but has the potential to explain the dark energy and dark matter, that are indirectly observed.
Such spots have since been observed indirectly on many systems.
When visible light is produced, plasma generation can be indirectly observed even with bare eyes.
Speciation has been observed directly and indirectly in the lab and in nature.
Energy - an indirectly observed quantity, often understood as the ability a physical system has to do work on other physical systems.
The drop in viscosity can be indirectly observed.
Neutralino dark matter could be observed experimentally in nature either indirectly or directly.
Crystallization can also be observed indirectly through its effects on stress-strain and fatigue behavior.
