It's rare for any observatory to directly image a planet beyond our solar system, called an exoplanet, but the powerful James ...

And so we measure distances in 'light years', which is very simply the distance that light travels in one year. Now, light travels very fast - 300,000 kilometres per second - so, to get the number ...

The closest-known exoplanet, called Proxima b, is about 4.2 light-years away from us (a distance of about 24.7 trillion miles or 39.7 trillion kilometers). However, the fastest any spacecraft has ...

Light covers 186,000 miles EVERY SECOND (kids ... Its distance is 1500 light years, meaning that the light we see from it left more than a thousand years before the invention of the telescope.

A light year is a distance. It is the distance light travels in one year. As light travels at constant speed, the distance light travels in a year can be calculated using the equation: ...