Our universe is a weird place and nothing strange that it contains enough of mysteries. There is no end of imaginations regarding the dark unsolved matters of the universe that has puzzled the human mind. Every day scientists and astronomers are facing new surprises, pushing them towards new challenges. Our world is shaped by all kinds of unseen forces that we don’t fully understand. We have discovered only five per cent of the universe, and we are still looking for the rest. About 27 per cent of the universe is believed to be dark matter. So here are some of the strangest objects in the universe.
According to scientists, stars, planets, galaxies and other things that we can see, hold less than 5% of the total universe. Another ~25% is a strange substance called dark matter. It can neither seen nor detected directly using current technologies. Scientists believe that dark matter acts like a spider’s web, comprised of fast-moving galaxies. Some say the dark matter consists of an undiscovered particle or particles. Several others believe it to be an undiscovered property of gravity.
Another unresolved object is a black hole. Experts say there could be up to 100 million black holes in our galaxy. A black hole is a region of space time in which the force of gravity so strong that no particles or even electromagnetic radiation as light can escape from it. They can be billions of times more massive than the sun. It acts like an ideal black body, reflecting no light at all. Most of the black holes form from the leftovers of a massive star that dies in a supernova explosion.
Mysterious Radio Waves
Researchers have been receiving ultra-strong radio signals since 2007, lasting for a few milliseconds. These flashes have been called fast radio bursts (FRBs). They appear to be coming from about 1.5 billion lightyears away. Recently, the scientists observed a very unusual repeating signal coming from the 13 FRBs which flashed six times in a row. FRBs are short, bright flashes of radio waves. Scientists believe there could be as many as a thousand FRBs in the sky every day. Astronomers are using artificial intelligence to discover the source of the shrieks.
In the early stage of 1990, we were only familiar with the planets of the solar system. But the astronomers have since identified more than 500 extrasolar planets or exoplanets as of November 2010. The evidence of an exoplanet was noted first in 1917, but the confirmation of detection occurred in 1992. The NASA Exoplanet Archive has listed HR 2562 b, as the most massive planet that is about 30 times the mass of Jupiter. Most of the confirmed exoplanets have been detected by indirect techniques of detection, mainly by radial velocity measurements and transit monitoring techniques.
Living Fossil Galaxy
Do you know there is a ghost galaxy far out in the cosmos? It shines with only a faint glimmer of starlight. Astronomers are trying to find out how it formed. DGSAT I was discovered in 2016. It is an ultra-diffuse galaxy (UDG) which is as big as a typical galaxy, but it has very tiny starlight. It is different from others that govern even similar UDGs. The study suggests, DGSAT 1 is a living fossil that was formed by the Bing Bang just 1 billion or so years ago.