Gravitational forces have several noticeable effects on objects in the universe. Let's explore some of these effects:

1. Weight and Weightlessness: The gravitational force exerted by a massive object, such as the Earth, creates a sensation of weight. When we stand on the ground, we feel the Earth's gravitational pull, giving us a sense of weight. However, in space, where there is no significant gravitational force, objects and astronauts experience a state of weightlessness.

2. Orbital Motion: Gravitational forces are responsible for the orbital motion of celestial bodies. For example, the Moon orbits around the Earth due to the gravitational pull between the two. Similarly, planets orbit the Sun because of the Sun's gravitational force on them.

3. Tides: The gravitational interactions between the Earth, Moon, and Sun cause the phenomenon of tides. The Moon's gravitational force creates tidal bulges on Earth, causing the rise and fall of sea levels. The Sun's gravity also contributes to tides, although to a lesser extent.

These effects of gravitational forces shape our understanding of the universe and have a profound impact on our daily lives.