Page 2 - Letter P - Universe dictionary by Futura-Sciences

Alphabetical index

Photosphere The photosphere is the visible surface of a star (optical ...	Pink moon A so-called pink moon at beginning of spring is sometimes ...
Planck satellite The Planck satellite was launched in July 2008 by the Ariane ...	Planet The International Astronomical Union (IAU) deliberated ...
Planetary aberration A planetary aberration is an apparent shift in the observed ...	Planetary nebula A planetary nebula is an envelope of expanding gas around a ...
Planetocentric coordinates Planetocentric coordinates are coordinates used to locate a ...	Planetographic Coordinates Planetographic coordinates are coordinates used to map the ...
Planum On Mars, this term denotes a region with a high plateau or ...	Pleiades The Pleiades cluster is a group of stars in the ...
Pluto Pluto When it was discovered by Clyde Tombaugh in 1930, ...	Polar coordinates of a direction The polar coordinates of the direction referred to the true ...
Polar mount A polar mount is a two-axis telescope mount, one of the ...	Powder acceleration stage The powder acceleration stage works with two solid fuel ...
Precession Precession is a modification in the direction of the axis of ...	Precession constant The precession constant is a coefficient of time in the ...
Precession-nutation Precession-nutation is the displacement over time of the ...	Propellant A mixture of fuel components for the propulsion of rockets. ...
Proper motion of a star The proper motion of a star is the right ascension and ...	Proper time In relativistic mechanics, proper time is the time read on a ...