Space Travel

Can we travel at the speed of light ?

No, we cannot travel at the speed of light.
If an object travels at the speed of light, its mass will increase exponentially ! The speed of light is 186,000 miles per second and when an object moves at or close to this speed, its mass will become infinite. Therefore, infinite energy will be required to move the object, which is an impossibility. That is the reason why no object can move at the speed or faster than the speed of light.

Excepting the Sun our nearest star is Proxima Centauri at 4.22 million light years away from us. That is almost 140 days travelling at the speed of light. Other stars are tens, hundreds, thousands, millions or even billions of light years from us.

Saturn is currently NASA's dream child of a manned visit. Saturn is 794 million miles from Earth at its closest. At a speed of the Voyager space probe of 38,000 mph, it would take 2.5 years to get there and the same to get back.

The whole prospect of serious space travel is a theoretical pipe dream.

Because of the mega-distances involved between planets, stars and galaxies, unless in the distant future an astro - physics means of bending space/time is found (probably another pipe dream), space travel is nothing more than an interesting but impossible dream.

By the same principles, it completely rules out the slightest possibility of any Alien visitors to Earth.