Letter P - Universe dictionary by Futura-Sciences

Alphabetical index

P80 P80 is the first stage of the Vega launcher. It is composed ...	Pallasite Pallasites are mixed meteorites in which olivine crystals ...
Pan Pan (Saturn XVIII) was discovered by Mark R.Showalter in ...	Panspermia Panspermia: Historically, panspermia was a theory according ...
Parallax A parallax is a periodic shift in the apparent positions of ...	Parasol Parasol is the second micro-satellite in the Myriade line ...
Parsec A parsec is the distance at which a star must be to have a ...	Partial eclipse A partial eclipse occurs when the Moon does not hide the Sun ...
Pegasus Pegasus is a launcher that differs from its competitors. It ...	Penumbra A region of space in which a body partly hides the Sun.
Perigee The perigee is the point in the orbit of a celestial body or ...	Perihelion The perihelion is the point in the orbit of a planet that is ...
Perturbed elliptic motion Perturbed elliptic motion is motion close to Keplerian ...	PFS The PFS (Planetary Fourier Spectrometer) is a scientific ...
Phase angle A phase angle is a fundamental quantity when observing the ...	Phases of the Moon The successive appearances of the Moon occurring when the ...
Phobos Satellite of Mars. Phobos looks a lot like an asteroid: It ...	Phobos-Grunt Phobos-Grunt was a Russian mission consisting in sending a ...
Phoenix Mars Lander Launched on 4 August 2007 by a Delta II rocket from Cape ...	Photoelectric A material is photoelectric if it emits electrons when it is ...