Can A Spaceship Accelerate In Space? The astronauts on board the International Space Station are accelerating towards the center of the Earth at 8.7 m/s2, but the space station itself also accelerates at that same value of 8.7 m/s2, and so there’s no relative acceleration and no force that you experience. This same principle works
Why Is Light Speed The Maximum Speed? Nothing can travel faster than 300,000 kilometers per second (186,000 miles per second). Only massless particles, including photons, which make up light, can travel at that speed. It’s impossible to accelerate any material object up to the speed of light because it would take an infinite amount of
What Is The Cosmic Speed Limit Equal To? For centuries, physicists thought there was no limit to how fast an object could travel. But Einstein showed that the universe does, in fact, have a speed limit: the speed of light in a vacuum (that is, empty space). Nothing can travel faster than 300,000 kilometers per
What Is The Fastest Particle In The Universe? A tachyon (/ˈtækiɒn/) or tachyonic particle is a hypothetical particle that always travels faster than light. Most physicists believe that faster-than-light particles cannot exist because they are not consistent with the known laws of physics. Which is faster than light? Albert Einstein’s special theory of relativity famously