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