James Webb spots ancient dust that could be from the earliest supernovas
Dust might not sound like the most interesting of topics, but to a certain set of astronomers, it’s thrilling. Researchers recently used the James Webb Space Telescope to identify grains of dust from the early universe, which could have been produced by the earliest supernovas. James Webb is a powerful tool because it allows researchers to identify extremely distant, and therefore extremely old, galaxies. Webb can be used to not only identify these early galaxies but also to take spectra from them, which can reveal their chemical composition by seeing which wavelengths of light they absorb....