The speed of light is a fundamental constant, approximately 299,792,458 meters per second. It's the same for all observers and hasn't changed measurably over billions of years. Nothing can travel ...

An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be ...

Nothing can travel faster than light, or 299,792,458 meters per second. But a certain group of particles acts as if it can, a team of physicists recently concluded, potentially paving the way for a ...

Congratulations on noticing an effect called superluminal expansion, a phenomenon we see in a light echo. The echo appears to us to expand at many times the speed of light, seemingly violating the ...

The idea of traveling faster than the speed of light (FTL) has been a popular idea long before [Alcubierre] came up with the first plausible theoretical underpinnings for such a technology. Yet even ...

Lawbreakers? faster-than-light Polarization Currents, The Electromagnetic “Boom” and Pulsar Observational Data Pulsars are neutron stars that emit amazingly regular, short bursts of radio waves, so ...

To travel the stars without faster than light travel we’re going to need a generation ship. In the far future we may have advanced propulsion technologies, but what if those technologies never ...

Astronomers measure the speed at which the solar system is hurtling through space by mapping surrounding galaxies and ...

Physicists have a stock phrase they trot out whenever someone claims to have made an astounding discovery about the universe. “Important,” they say, “if true.” It’s a tactful way of saying, “Don’t bet ...