21. The development of a passive hydrogen maser for QZSS was abandoned in 2006. 22. The radiation amplified by hydroxyl masers is the radio continuum of its host. 23. The " antigravity " Phonon Maser is hidden in the secret undeground lab. 24. Maser began her television career as a freelance writer.25. Together, they later invented the laser and its cousin, the maser . 26. H 2 O and OH can both be pumped to produce maser emission. 27. Some of them, among which is W Aquilae show SiO maser emission. 28. Some of them, among which is S Cassiopeiae show SiO maser emission. 29. IK Tauri has strong maser emission from its extended atmosphere and circumstellar material. 30. A maser is the radio counterpart of a laser, which amplifies visible light.
