CEFR C2 Vocabulary - Astronomy

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

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

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

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

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

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

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

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

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

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

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

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

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

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

the space surrounding the Sun dominated by solar wind

very small molecules serving as raw material for forming planets and they exist in between galaxies, stars, and etc.; originally derived from the stars

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

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

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

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

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

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

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

of the objects, phenomena, or structures that exist beyond or outside of our own galaxy, the Milky Way

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

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