Connect with us

Space

Mysterious Radio Burst Picked up by China’s Radio Telescope

Mysterious Radio Burst Picked up by China’s Radio Telescope 86

Is someone or something trying to contact earth?

China’s Five-hundred-meter Aperture Spherical Radio Telescope (FAST) has detected a repeating fast radio burst (FRB) — mysterious radio signals from outer space — for the first time, Science and Technology Daily reported.

Scientists on the FAST project with the National Astronomical Observatories of China, part of the Chinese Academy of Sciences, revealed the news to China Daily on Wednesday.

The FRB originated some three billion light years away from Earth. Interference factors including aircraft and satellites have been eliminated and cross validation is being carried out, the scientists said.

FRB is one of the hottest topics in astronomy. It was not until 2007 when the first FRB was discovered by humans. Fewer than 100 FRBs have been detected internationally to date.

There is still no cohesive explanation for the origin of FRB in the international scientific community at present. FRBs mostly only appear once, which makes them very hard to track.

The FRB detected by FAST’s real-time detection terminal, however, is one that has been observed before, said Zhang Xinxin, an assistant engineer with the NAOC.

Known as FRB121102, it was first discovered in 2012 and found to repeat in 2015. Analysis of data later located the source of the signal coming from a dwarf galaxy three billion light years away.

The first pulse from FRB121102 was spotted by FAST on Aug 30. After this, the telescope recorded dozens of pulses from the FRB over the course of days. On Sept 3 alone, more than 20 pulses were detected.

The number of enigmatic bursts detected so far is too small to draw any conclusions, Zhang said. FAST, the world’s largest single-dish radio telescope, has a certain edge in detecting repeated FRBs.

This is because the 19-beam receiver installed on FAST, covering frequency ranges of 1.05 – 1.45 GHz, is very sensitive to radio signals, Zhang said.

Scientists of the FAST project will adjust the debugging observation missions of the telescope to conduct follow-up observations of FRB121102 as it is currently in a period of activity, Zhang said.

It is hoped other telescope facilities around the world will also carry out observations, she added. More samples are expected to contribute to research on the origin and physical mechanism of the FRBs, she said.

DM Chan
Asia Times
Image Credit: © Asia Times

Comments

Space

Why the universe does not fit into science

Why the universe does not fit into science 93
Photo: YouTube

Science can be compared to an artist painting what he has never seen, or to a writer describing other people’s travels: objects that he has never seen, places where he has never been. Sometimes such scientific “arts” turn out to be beautiful and interesting, but most of them will forever remain only theories, because they are beyond human capabilities.

In fact, science has the right only to speculate: how our universe appeared, how old it is, how many stars and other objects it contains.

Universe model

Why the universe does not fit into science 94

How many stars are there in the sky?

With an unarmed eye, a person can see about nine thousand stars in the sky in one cloudless and moonless night. And armed with binoculars or a telescope, much more – up to several million. However, this is much less than their true number in the universe. Indeed, only in our one galaxy (the Milky Way) there are about 400 billion stars. The exact amount, of course, is not known to science. And the visible universe contains about 170 billion galaxies.

It is worth clarifying that scientists can see the universe 46 billion light years deep in all directions. And the visible (observable) universe includes the space accessible to our eyes from the moment of the Big Explosion. In other words, only this (accessible to human perception) space science refers to our universe. Science does not consider everything that follows.

It is believed that there are supposedly a ceptillion (10 to 24 degrees) stars in our universe. These are theoretical calculations based on the approximate size and age of the universe. The origin of the universe is explained by the Big Bang theory. This is why the universe is constantly expanding and the more time passes, the more complex the universe and its components become.

Why the universe does not fit into science 95

It is not entirely correct to consider and perceive this scientific theory “head-on”. Scientists always claim that that explosion was not exactly an explosion, and the point that exploded was not the only one. After all, it was everywhere, because space did not exist then. And in general – everything happened quite differently from what is described in the Big Bang theory, but all other descriptions of the origin of the universe are even more incredible and inaccurate.

Separate but interconnected

That which is beyond the reach of human perception is usually discarded by science, or recognized as non-existent. Recognizing one thing, science does not want to recognize the existence of the other, although everything in our world is interconnected and is not able to exist separately – by itself.

Each object of the universe is a part of it much more than an independent, separate object.

Any person, like any material object of our world, consists of components: organs, cells, molecules, atoms. And each of its constituent parts can represent the whole world. Separate, and at the same time connected with all the others.

However, science, as a rule, perceives all the components of the universe – people, animals, plants, objects, the Earth, the Sun, other planets and stars – as separate subjects, thereby limiting itself.

Why the universe does not fit into science 96

Even what is considered the visible universe, one of the atoms of which could be called our solar system, is not subject to the boundaries of human perception. But perhaps the atom is an exaggeration, and our solar system is not even an atom, but one of its elements!

How, being so far from the truth, can one reason about something with the degree of probability with which science tries to reason about the origin of the universe?

Continue Reading

Space

An unexplained wobble shifts the poles of Mars

An unexplained wobble shifts the poles of Mars 97

The red planet sways from side to side like a whirligig when it loses speed. The new study allowed scientists to notice that the poles of Mars deviate slightly from the axis of rotation of the planet. On average, they move 10 cm from the center with a period of 200 days.

Such changes are called the Chandler Oscillations  – after the American astronomer Seth Chandler, who discovered them in 1891. Previously, they were only seen on Earth. It is known that the displacement of the poles of rotation of our planet occurs with a period of 433 days, while the amplitude reaches 15 meters. There is no exact answer why this is happening. It is believed that the fluctuations are influenced by processes in the ocean and the Earth’s atmosphere.

Chandler’s wobbles on Mars are equally perplexing. The authors of the study discovered them by comparing data from 18 years of studying the planet. The information was obtained thanks to three spacecraft that orbit the Red Planet: Mars Odyssey, Mars Reconnaissance Orbiter and Mars Global Surveyor. 

Since Mars has no oceans, it is likely that the Red Planet’s wobbly rotation is due to changes in atmospheric pressure. This is the first explanation that researchers have shared. In the future, there should be new details about the fluctuations that have so interested the scientific community.

Continue Reading

Space

Possible “portals” to distant regions of the Universe found in space

Possible "portals" to distant regions of the Universe found in space 98

Scientists have found in space possible “portals” to distant regions of the universe. They could be some supermassive black holes in the center of galaxies. This is reported by the Monthly Notices of the Royal Society magazine. In theory, a spaceship can pass through such portals.

Russian scientists have found that black holes in very bright galaxies may be the entrances to these “portals” or “wormholes”. In theory, a spaceship can pass through such portals. However, they are surrounded by intense radiation, which negates the crew’s chances of survival.

The similarity between a wormhole and a black hole is that they have extremely strong gravity. However, as scientists believe, the body cannot get out of the black hole, falling beyond the event horizon, while the “wormhole” must have an exit somewhere else in space.

Possible "portals" to distant regions of the Universe found in space 99
Photo: 
NASA

So, experts say, the collision of two bodies inside a wormhole in images from space would look like an explosion. That is, the active galactic nucleus (AGN), which seemed to be such earlier, may in fact be the entrance to the “portal”.

Russian physicist Mikhail Piotrovich emphasizes that scientists still know little about the internal structure of the “wormhole.” Moreover, they are not even sure that such a phenomenon exists at all. In addition, the closest object similar to it is 13 million light-years away, so humans are unlikely to be able to reach it in the foreseeable future.

Continue Reading
Advertisement

DO NOT MISS

Trending