He could barely see the spectral features that lurked beneath it.

Astronomers have paid particular attention to whether earthshine measurement can detect the red edge, a spectral feature that is due to the plants.

A number of statistical measures are available for quantifying spectral features in a simple way.

This results in a large spectral feature known as a rising edge.

The equivalent width is used as a quantitative measure of the strength of spectral features.

Their colors are somewhat redder than S-type asteroids and they do not show spectral features.

Both yield very similar spectral features which are difficult to distinguish; their emission dynamics, however, vary significantly.

"It does not have spectral features in the range we can observe."

The primary science objective was to study detailed spectral features in cosmic sources and their temporal changes.

Asteroid families can be confirmed when the members display common spectral features.