2007-11-27 10:55:29 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
This radiation from neutral hydrogen is used extensively in astronomy. See the source:
2007-11-27 11:01:15 · answer #1 · answered by jgoulden 7 · 0⤊ 0⤋
This is one of the bands for the hydrogen spectra. Is used tho see the Doppler effect and calculate the expansion of the Universe.
The SETI programs suppouse that the ETI would send signals in this frecuency.
2007-11-27 11:04:42 · answer #2 · answered by Anonymous · 0⤊ 0⤋
21cm line is produced by ability of unattached impartial Hydrogen got here across in the nebulae and interstellar clouds. it rather is a diffused distinction between 2 states of impartial Hydrogen and being in Microwave area of spectrum, unabsorbed by ability of the interstellar medium. Galaxies are generally the interstellar dirt & nebulae serving as nurseries for brand spanking new movie star systems. this is the main nicely known technique that is going on in galaxies. {your determination of solutions does not tournament}
2016-12-10 07:14:31 · answer #3 · answered by tenuta 4 · 0⤊ 0⤋