The horizontal and vertical semi-diameters of the Sun observed at the Cape of Good Hope (1834 - 1887) and Paris (1837 - 1906): A report on work in progress
The Horizontal Branch of the M31 Dwarf Spheroidal Companion Andromeda-I CYCLE4 Medium
The Horizontal E-region Experiment: Evidence for inertial instability on the evening side of the auroral oval?
The horizontal propagation of Pc1 pulsations in the ionosphere
The Host Galaxies of Active Galactic Nuclei at z 2-3
The Host Galaxies of Dust-Obscured Gamma-Ray Bursts
The Host Galaxies of Long Gamma-Ray Bursts:. the Mid-Infrared View from the Spitzer Space Telescope
The host galaxies of narrow-line Seyfert-1s: Evidence for bar-driven fueling
The Host Galaxies of Radio-Quiet - Redshift Quasi-Stellar Objects
The Host Galaxies of Type II Quasars
The Host Galaxies Of UV-selected AGNs At z 2-3
The Host Galaxy and Environment of the Binary Quasar J1643+3156
The Hosts of Megamaser Disk Galaxies
The hot and cold interstellar matter of early type galaxies and their radio emission
The hot carbon, oxygen, and nitrogen echelle spectrograph
The hot ion component of the magnetospheric plasma and some relations to the electron component - Observations and physical implications
The hot plasma environment and floating potentials of an electron-beam-emitting rocket in the ionosphere
The hot plasma environment at Jupiter - ULYSSES results
The Hot Stellar Component in the Centers of M31 and M32: Cycle 4 Medium
The Hot Stellar Component in the Centers of M31 and M32: CYCLE3 High