hydrogen line

Summary

hydrogen line is a spectral line^[1]. It draws 358 Wikipedia views per month (spectral_line category, ranking #1 of 5).^[2]

Key Facts

• hydrogen line's image is recorded as Hydrogen-SpinFlip.svg^[3].
• hydrogen line's instance of is recorded as spectral line^[4].
• hydrogen line's Commons category is recorded as 21cm line^[5].
• hydrogen line's Freebase ID is recorded as /m/02why3^[6].
• hydrogen line's Encyclopædia Britannica Online ID is recorded as topic/21-centimetre-radiation^[7].
• hydrogen line's frequency is recorded as {'unit': 'Q39369', 'amount': '+1420405751.7667'}^[8].
• hydrogen line's wavelength is recorded as {'unit': 'Q174728', 'amount': '+21.10611405413'}^[9].
• hydrogen line's nLab ID is recorded as hydrogen line^[10].
• hydrogen line's Unified Astronomy Thesaurus ID is recorded as 690^[11].
• hydrogen line's Microsoft Academic ID is recorded as 164918935^[12].
• hydrogen line's Lex ID is recorded as 21_cm-linjen^[13].
• hydrogen line's OpenAlex ID is recorded as C164918935^[14].

Why It Matters

hydrogen line draws 358 Wikipedia views per month (spectral_line category, ranking #1 of 5).^[2] It has Wikipedia articles in 20 language editions, a strong signal of global cultural recognition.^[15] It is known by 14 alternative names across languages and contexts.^[16]