White hole Welcome to my blog “ Mystery of Galaxy” . An artistic representation of a white hole. Source: NASA’s Goddard Space Flight Center/Discover From the mathematics of Einstein’s general relativity comes an object so peculiar, a white hole. The white holes twin of a black hole, was first thought of in the 18th century by the geologist John Mitchell . In those days, black holes were not considered to be real, Einstein even assumed they didn’t exist. Yet Einstein’s theory of general relativity predicts and allows a concept named a white hole. More specifically it’s the mathematics of general relativity that say that white holes are possible. If you take the mathematics of a black hole and literally reverse it, you get a white hole. Or even, a white hole is a time-reversed blackhole. So, a black hole will not allow any matter to escape, once the matter is cross the event horizon, an imaginary boundary around a blackhole where no matter can escape after passing it. And so take t
Possible sign of life on Venus Welcome to my blog "Mystery of Galaxy" . Today's topic is" Is phosphine the sign of life on Venus?" Venus Source: Pablo Carlos Budassi / CC BY-SA Finding signs of life on other planets beyond the Earth would be away of answering the biggest questions that we've had as a species so far. Where do we come from? Are we alone? Deep within the acid clouds above Venus, astronomers have detected something new, a gas that could be a sign of life. The gas is phosphine, a toxic molecule with an odor of garlic and dead fish. Astronomers discovered the compound in a cloud layer where temperatures are fairly close to those on earth's surface. Phosphine is exciting because of where it comes from. On earth, it's either manufactured by humans, or it's a natural byproduct of life. It just doesn't show up anywhere else, and there's no human manufacturing on Venus. Phosphine is not sure fireproof there are alien microbes on t