A) The study of individual stars only. B) The study of planets within star systems. C) The study of the collective motion of stars in galaxies and star clusters. D) The study of how stars form and die.
A) Gravity B) Weak nuclear force C) Strong nuclear force D) Electromagnetic force
A) A cluster of black holes. B) A group of planets around a star. C) A single star in space. D) A large system of stars, gas, and dust bound together by gravity.
A) Energy generated by stars. B) Energy found in quasars. C) A hypothetical form of energy that may explain the accelerating expansion of the universe. D) Energy emitted by black holes.
A) The distance at which a planet orbits around a star. B) The distance within which a celestial body will disintegrate due to tidal forces. C) The point at which a star collapses into a black hole. D) The boundary between a star's core and its atmosphere.
A) The maximum mass of a black hole. B) The limit of mass for a main sequence star. C) The maximum mass of a stable white dwarf star. D) The limit of luminosity for a red giant star.
A) A hole in the fabric of space. B) A region of space with extreme heat. C) A magnetic field in space. D) A region of spacetime where gravity is so strong that nothing, not even light, can escape.
A) A type of asteroid. B) A star with little gravitational pull. C) A star composed entirely of neutrons. D) A very dense remnant of a massive star after a supernova explosion.
A) A region of space with high radiation. B) The structure resulting from the explosion of a star. C) A type of black hole. D) A type of planet in orbit around a star.
A) A star surrounded by nebulae. B) An extremely luminous active galactic nucleus. C) A dimly lit region of a galaxy. D) A planet orbiting a black hole. |