First selfies in space

Buzz Aldrin took this photo against the Earth during the Gemini 12 mission in November 1966.

Is it possible to fly into space in an airplane?

The fundamental difference between an airplane and a rocket is the engine. The jet engine (air-jet engine of an airplane), in airless space (or in very rarefied layers) will suffocate, because it needs to consume oxygen, for the fuel combustion process.

In a rocket engine, there are…Read More

What’s the difference between black and white holes?

First, a white hole is a hypothetical physical object in the Universe, their existence is not proven😐

A black hole differs from a white not only by its color, but also by the quality of its opposite. If a black hole is an entrance without an exit, a white hole is an “exit without an e…Read More