Concept
Absorption Line
A dark notch in a spectrum.
A dip in a continuous spectrum caused by cooler gas in front of a hotter source absorbing specific wavelengths.
Overview
A dip in a continuous spectrum caused by cooler gas in front of a hotter source absorbing specific wavelengths.
See also
Emission Line
A bright peak in a spectrum.
The Big Bang
How everything began, 13.8 billion years ago.
Black Holes
Regions where gravity stops light itself.
Dark Matter
The invisible mass holding galaxies together.
Dark Energy
The mysterious force accelerating the universe.
Light-Year & Astronomical Distances
Measuring the unimaginable.