Vocabulary #11

star: a large, hot ball of gases, which  is held together be gravity and gives off its own light.

parallax: the apparent shift in an object's location when viewed from towo position.

light-year: the distance light travels in a year.

contellation: a number of stars that appears to from a pattern.

magnitude: the brightness os a star.

nebula: a cloud of gas and dut in space.

supernova: a start that explodes.

black hole: an object whose gravity is so strong that light cannot escape it.