Yes, everything in the universe is affected by gravity. Gravity is a fundamental force of nature that attracts objects with mass or energy towards each other. According to the theory of general relativity, proposed by Albert Einstein, gravity arises due to the curvature of spacetime caused by mass and energy. This curvature influences the motion of all objects, causing them to be attracted to each other.
Gravity is a universal force that acts on all types of matter, whether it is a small object on Earth or a massive celestial body like a planet, star, or galaxy. The strength of gravity depends on the masses of the objects involved and the distance between them. Objects with larger masses exert a stronger gravitational force, while increasing the distance between objects weakens the gravitational attraction.
Therefore, whether it is the motion of planets in the solar system, the orbits of stars in galaxies, or the everyday experiences of objects falling to the ground, gravity plays a crucial role in shaping and governing the behavior of the universe.