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