noun. a gaseous layer of the sun's atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun.
- natural object
Example sentences of the word chromosphere
1. Noun, singular or mass
In the sun, the chromosphere is red-colored from an abundance of hydrogen gas, though this color can only be seen with special filters or during an eclipse as a red circle.
The chromosphere gets its name from its color, which is a deep red.
The *chromosphere* extends about 2,000 to 10,000 km above the sun's surface (that is, the outermost part of the photosphere), depending on what source you consult.