Letter H - Universe dictionary by Futura-Sciences

Alphabetical index

Hale-Bopp comet The Hale-Bopp comet was discovered on 23 July 1995 by two ...	Halley's comet This is undoubtedly the best known comet. In 1705, the ...
Hayabusa Developed by JAXA (the Japanese space agency), MUSES-C was ...	Heliocentric Heliocentric refers to a reference system with the Sun at its centre.
Heliopause The heliopause is the limit where the solar wind meets the ...	HELIOS HELIOS, the French military reconnaissance ...
HELIOS II HELIOS II operates in the visible and infrared spectra, ...	Heliosphere The heliosphere is the space bounding the heliopause ...
Helium Heium, which has the symbol He and atomic number 2, is the ...	Herschel satellite The Herschel satellite was launched on 14 May 2009 by an ...
HESS Inaugurated in September 2004 and installed in Namibia, the ...	Hipparcos Hipparcos was the first space astrometry mission (astrometry ...
Horizontal coordinates of a direction The polar coordinates of the direction carried over to the ...	Hot Jupiter Hot Jupiters are exoplanets often exceeding the mass of ...
Hour angle The hour angle is one of the hour coordinates. The dihedral ...	Hour circle of a direction The hour circle of a direction is a semi-great circle of the ...
Hubble constant The Hubble constant gives the rate of expansion of the ...	Hubble telescope The fruit of an unprecedented collaboration between the ...
Hubble's law Hubble's law is the relationship between the speed and the ...	Huygens probe The HUYGENS probe is 350 kg of concentrated technology. Its ...