Moon – It is a solid heavenly body that revolves around a planet. The moon revolves around the earth so the moon is a natural satellite of the earth. Moon is the fifth largest satellite in the Solar System. The orbit of the moon around the earth at an average lunar distance of about 384,000km…

Black Hole A black hole is an object with such a strong gravitational field that even light cannot escape from its surface. A black hole may be formed when a massive object (very big object) undergoes uncontrolled contraction (collapse) because of the inward pull of its own gravity. https://www.qries.com/What-is-the-black-hole-in-the-galaxy-Why-is-it-black/answer/Daneel-Yunus

There is a layer of ozone gas in the upper atmosphere at a height between 15 kilometers and 60 kilometers. This ozone layer is very important for the existence of life on earth because ozone layer absorbs most of the harmful ultra-violet radiations coming from the sun which can cause skin cancer. The ozone forms…