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