Studying the line spectra produced by hot gases and absorbed by cooler gases allows us to identify the elements in stars. When a gas is very hot, it doesn’t emit all wavelengths of light.

An international team of astronomers has detected the bright hydrogen emission coming from a galaxy located in an unusually ...

That signal is an emission light – a bright region in the gamma-ray spectrum produced by something ... to be the first high-confidence emission line ever seen in 50 years of studying gamma ...

This causes line emission spectra to be produced, as shown below. This is not a continuous spectrum as only light of specific frequencies and specific colours are produced. Different types of ...

NASA's James Webb Space Telescope has captured bright auroral activity on Neptune for the first time, NASA said on ...