| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Hanseatic league | No definition provided | Christopher Rauch | 2023.12.01 |
| HAO_at_Mauna_Loa_Solar_Observatory | No definition provided | Ryan McGranaghan | 2023.04.16 |
| haopticalclass | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Ha or H-alpha | The first atomic transition in the hydrogen Balmer series; wavelength = 656.3 nm. This absorption line of neutral hydrogen falls in the red part of the visible spectrum and is convenient for solar obs ervations. The Ha line is commonly used for patrol observations of solar flares, filaments, prominences, and the fine structure of active regions. | Ryan McGranaghan | 2023.04.16 |
| HAPI | A Heliophysics Application ProgrammerInterface (HAPI) specification compliant access point. | Ryan McGranaghan | 2023.04.16 |
| Hapkeite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Happiness | No definition provided | Christopher Rauch | 2023.12.01 |
| Happiness. Philosophy of | No definition provided | Christopher Rauch | 2023.12.01 |
| Haradaite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Harari language | No definition provided | Christopher Rauch | 2023.12.01 |
| Hararis | No definition provided | Christopher Rauch | 2023.12.01 |
| harbor | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Harbor defenses | No definition provided | Christopher Rauch | 2023.12.01 |
| Harbor regulations | No definition provided | Christopher Rauch | 2023.12.01 |
| Harbors | No definition provided | Christopher Rauch | 2023.12.01 |
| Harbors--Pori charges | No definition provided | Christopher Rauch | 2023.12.01 |
| Harbors--Port charges | No definition provided | Christopher Rauch | 2023.12.01 |
| Harbors--Regulations | No definition provided | Christopher Rauch | 2023.12.01 |
| Harbors--U.S. | No definition provided | Christopher Rauch | 2023.12.01 |
| Harbors--Views | No definition provided | Christopher Rauch | 2023.12.01 |