Ever wondered what would happen if a 100 meter diamond travelling at 99.99999999999999999999951% of the speed of light collided with the earth?
The momentum would be enough to knock the Earth into a different orbit—but the Earth is no more. The energy deposited is ten thousand times greater than the planet’s gravitational binding energy, and the planet is blown into an expanding cloud of plasma, with a particularly energetic streamer extending away from the far side of the impact site, out into space.
Distance in terms of pixels
How Far is it to Mars?
Stellarium along with Celestia is one of the most interesting piece of software for those interested in Astronomy. Those who like to visit the planetarium will possibly love this program, especially given the fact that it is free (licensed under GPL). It brings the power of a panetarium (minus the viewing area) to your computer. Given the kind of light pollution at night in urban areas, Stellarium serves as an exploration tool for Astronomy enthusiasts.
Celestia is a software which explore the universe in 3D, & it is free just like Stellarium. It takes you a step further than a planetarium like software, by not confining you to Earth. For Astronomy enthusiasts or for anyone for that matter, this can provide an out of this world experience. Like, for example, viewing the entire solar system, & watching the planets go round the sun, or following Halley’s comet as it orbits the sun.