According to our current understanding of physics, nothing can travel faster than light in a vacuum. The speed of light in a vacuum, denoted as 'c', is considered to be the ultimate speed limit of the universe. It is approximately 299,792 kilometers per second (or about 186,282 miles per second).
In terms of objects with mass, as they approach the speed of light, their energy and relativistic mass increase, requiring an infinite amount of energy to accelerate them to or beyond the speed of light. This is why it is impossible for objects with mass to travel faster than light.
On the other hand, there are various things that are slower than light. For example:
Sound: Sound travels at different speeds depending on the medium it passes through. In air at room temperature, sound travels at approximately 343 meters per second (or about 1,125 feet per second), which is significantly slower than the speed of light.
Vehicles, airplanes, and other modes of transportation: These move at speeds much slower than the speed of light. Even the fastest vehicles, such as spacecraft, operate at a tiny fraction of the speed of light.
Electrical signals: When information is transmitted through electrical signals in wires or cables, it travels at speeds that are significantly slower than the speed of light. In most cases, it approaches the speed of light but does not exceed it.
Most celestial objects: While light can take a long time to travel vast distances in space, the speeds at which celestial objects move are generally much lower than the speed of light. Planets, stars, and galaxies typically have velocities that are negligible compared to the speed of light.
It's important to note that there are ongoing scientific inquiries and research exploring phenomena such as quantum entanglement, wormholes, and other theoretical concepts that could potentially have implications for superluminal (faster-than-light) travel. However, at present, these ideas remain speculative and have not been demonstrated or confirmed within the bounds of our current scientific understanding.