Blueshift is a term often used in astronomy to describe the phenomenon where light from an object is shifted towards the blue end of the spectrum. This occurs when the object is moving closer to the observer, indicating that it is approaching at a high speed. The effect is a key concept in understanding the motion of celestial bodies, such as stars and galaxies. In contrast to blueshift, there is also redshift, which occurs when an object is moving away from the observer, causing the light to shift towards the red end of the spectrum. Both blueshift and redshift are important for studying the universe, including the expansion of the universe and the movement of galaxies.