Liste de Mots Niveau C2 - Astronomie

a region beyond Neptune in the solar system containing icy objects like dwarf planets, asteroids, and comets

ceinture de Kuiper

a highly energetic celestial object emitting powerful radiation from the center of a galaxy, often associated with a supermassive black hole

quasar

a distant, hypothetical region surrounding the solar system, thought to harbor icy bodies and comets

nuage de oort

the outer layer of the Sun's atmosphere, observable as a plasma halo during a solar eclipse

couronne stellaire

the apparent path that the Sun traces in the sky over the course of a year, which is also the plane of the Earth's orbit around the Sun

écliptique

the apparent displacement or difference in the apparent position of an object when viewed along two different lines of sight, often used in astronomy to measure the distance of nearby stars

parallaxe

a highly magnetized, rotating neutron star that emits beams of electromagnetic radiation from its magnetic poles

pulsar

a unit of measurement equal to the average distance between the Earth and the Sun, approximately 149.6 million kilometers

unité astronomique

a unit of astronomical distance equivalent to about 3.26 light-years

parsec

a high-energy particle, mainly originating from outside the Solar System, that travels through space at nearly the speed of light

rayon cosmique

(cosmology) the faint glow of radiation spreading through the universe, believed to be residual radiation from the Big Bang

rayonnement de fond cosmique

(cosmology) a theory proposing that the solar system formed from a rotating nebula of gas and dust about 4.6 billion years ago

hypothèse nébulaire

(cosmology) a measure of the rate at which the universe is expanding, determined from the observation of distant galaxies' recession velocities

taux d'expansion de l'univers

the matter and radiation that exists in the space between stars within a galaxy

milieu interstellaire

the space surrounding the Sun dominated by solar wind

héliosphère

very small particles originally derived from stars, serving as raw material for forming planets, and existing between galaxies, stars, and other celestial bodies

poussière cosmique

a small celestial body that becomes visible as a meteor upon entrance into the atmosphere of the earth

météoroïde

(cosmology) the rapid expansion of the universe following the Big Bang

inflation cosmique

(astronomy) a set of three fundamental principles describing the motion of planets around the Sun, formulated by Johannes Kepler

la loi de Kepler

a disruption in earth's magnetic field caused by solar activity, resulting in variations that can impact electronic systems and communications on earth

orage magnétique

the colored lights, mainly green and red, in the sky seen primarily near the southern magnetic pole

aurore australe

the colored lights, mainly green and red, in the sky seen primarily near the northern magnetic pole

aurore boréale

associated with the phenomena, processes, or theories related to the origin and formation of the universe or celestial bodies

relatif aux origines de l'univers

study of celestial objects outside the Milky Way galaxy

astronomie extragalactique

relating to or resembling a nebula, which is a cloud of gas and dust in outer space

nébulaire

relating to the stars or constellations, especially in terms of their positions relative to Earth

astral