A) The study of the collective motion of stars in galaxies and star clusters. B) The study of how stars form and die. C) The study of individual stars only. D) The study of planets within star systems.
A) Weak nuclear force B) Electromagnetic force C) Strong nuclear force D) Gravity
A) A single star in space. B) A group of planets around a star. C) A large system of stars, gas, and dust bound together by gravity. D) A cluster of black holes.
A) Energy generated by stars. B) A hypothetical form of energy that may explain the accelerating expansion of the universe. C) Energy emitted by black holes. D) Energy found in quasars.
A) A region of space with extreme heat. B) A hole in the fabric of space. 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 star surrounded by nebulae. B) An extremely luminous active galactic nucleus. C) A planet orbiting a black hole. D) A dimly lit region of a galaxy.
A) A star composed entirely of neutrons. B) A star with little gravitational pull. C) A type of asteroid. D) A very dense remnant of a massive star after a supernova explosion.
A) The structure resulting from the explosion of a star. B) A region of space with high radiation. C) A type of black hole. D) A type of planet in orbit around a star.
A) The maximum mass of a stable white dwarf star. B) The maximum mass of a black hole. C) The limit of mass for a main sequence star. D) The limit of luminosity for a red giant star.
A) The point at which a star collapses into a black hole. B) The distance within which a celestial body will disintegrate due to tidal forces. C) The boundary between a star's core and its atmosphere. D) The distance at which a planet orbits around a star. |