black hole (noun) a region of spacetime from which gravity prevents anything, including light, from escaping czarna dziura

dark matter (noun) a type of matter hypothesized to account for a large part of the total mass in the universe which neither emits nor absorbs light or other electromagnetic radiation ciemna materia

exoplanet (noun) a planet outside the Solar System egzoplaneta

galaxy (noun) a massive, gravitationally bound system consisting of stars, stellar remnants, interstellar medium of gas and dust, and, it is hypothesized, dark matter galaktyka

light year (noun) ① a distance that light travels in a vacuum in one Julian year (a unit of length) rok

świetlny; ② (coll.) a term for a big period of time rok świetlny: to be light years ahead of

sb wyprzedzać kogoś o lata świetlne

nebula (noun) an interstellar cloud of dust and gases mgławica

planetoid (noun) a small celestial object that orbits round the Sun planetoida

quasar (noun) a galaxy with very energetic and extremely luminous core kwazar

star cluster (noun) a group of at least few hundreds of stars gromada gwiazd

supernova (noun) an extremely luminous stellar explosion supernowa