| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Haytien Republic (Ship) | No definition provided | Christopher Rauch | 2023.12.01 |
| Hay trade | No definition provided | Christopher Rauch | 2023.12.01 |
| hazard | No definition provided | Ryan McGranaghan | 2023.04.16 |
| haze | Particles suspended, reducing visibility by scattering light; often a mixture of aerosols and photochemical smog. | Ryan McGranaghan | 2023.04.16 |
| Hazenite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Hazing | No definition provided | Christopher Rauch | 2023.12.01 |
| hazy | No definition provided | Ryan McGranaghan | 2023.04.16 |
| hbeta | No definition provided | Ryan McGranaghan | 2023.04.16 |
| H beta photometry | No definition provided | Ryan McGranaghan | 2023.04.16 |
| hbr | No definition provided | Ryan McGranaghan | 2023.04.16 |
| hbro | No definition provided | Ryan McGranaghan | 2023.04.16 |
| hc | No definition provided | Ryan McGranaghan | 2023.04.16 |
| HCC | Heliocentric Cartesian - A 3-D orthonormalcoordinate system that is primarily intended to specify with two dimensionsa point on the solar disk. The Z axis points toward the observer. The Y axislies in the plane defined by the solar spin vector and the Z axis, positivenorthward. The X axis is perpendicular to the Y and Z axes, positive towardsolar west. Standard representation for this system is via the point's x andy values, expressed either as physical distances or as fractions of thesolar disk radius. | Ryan McGranaghan | 2023.04.16 |
| HCD | Heliocentric of Date HCD XY-plane: Solar equator of date. +X-axis: Solar ascending node on ecliptic of date. | Ryan McGranaghan | 2023.04.16 |
| hcfc | No definition provided | Ryan McGranaghan | 2023.04.16 |
| hcfc140a | No definition provided | Ryan McGranaghan | 2023.04.16 |
| hcfc141b | No definition provided | Ryan McGranaghan | 2023.04.16 |
| hcfc142b | No definition provided | Ryan McGranaghan | 2023.04.16 |
| hcfc22 | No definition provided | Ryan McGranaghan | 2023.04.16 |
| hch | No definition provided | Ryan McGranaghan | 2023.04.16 |