Scientists have observed a mysterious <a href="https://www.wionews.com/world/intelligent-life-canadian-astronomers-detect-mysterious-radio-waves-from-space-189353">space signal</a> deep from space which has been repeating in a 16-day cycle.

The findings are included in the pre-print of a paper on arXiv.

Researchers from the Canadian Hydrogen Intensity Mapping Experiment (CHIME) under the Fast Radio Burst Project have noticed a pattern in a series of bursts coming from a single source half a billion light-years from Earth.

Also read:&nbsp;<a href="https://www.wionews.com/science-technology/astronomers-find-relationship-between-colliding-galaxies-black-holes-178150">Astronomers find relationship between colliding galaxies, black holes</a>

This pattern was detected between September 16, 2018 and October 30, 2019 in fast radio bursts (FRBs) which are millisecond-long bursts of radio waves in space.&nbsp;

In the traced pattern, it used to send radio wave bursts for a period of four days, stopped for a period of 12 days, then this entire process was repeated.&nbsp;

Usually, individual radio bursts emit once and don't repeat but repeating <a href="https://www.wionews.com/world/intelligent-life-canadian-astronomers-detect-mysterious-radio-waves-from-space-189353">fast radio burst</a>s are known to send out short, energetic radio waves multiple times. And usually when they repeat, it's sporadic or in a cluster, according to previous observations.

Also see: <a href="https://www.wionews.com/photos/in-a-first-water-found-on-earth-like-planet-beyond-our-solar-system-249176">In a first, water found on earth-like planet beyond our solar system</a>

Researchers are tracing the origin of these mysterious bursts but so far, they have traced myriad sources every burst.

The first repeating fast radio burst traced, <a href="https://www.wionews.com/world/intelligent-life-canadian-astronomers-detect-mysterious-radio-waves-from-space-189353">FRB </a>121102, linked back to a small dwarf galaxy containing stars and metals.

FRB 180916 was traced to one of the spiral arms of a Milky Way-esque galaxy. It was also within a star-forming region of the arm, the researchers said.

According to the researchers, the possible cause for such bursts to emit can be orbital motion of a star or an object that acts as a companion in the outskirts of the galaxy.&nbsp;

Last year, the CHIME/FRB collaboration detected the sources of eight new repeating FRBs and its signal. This recurring signal was traced to a massive spiral galaxy approximately 500 million light years away.

Scientists have observed a mysterious space signal deep from space which has been repeating in a 16-day cycle. The findings are included in the pre-print of a paper on arXiv.

Scientists have observed a mysterious space signal deep from space which has been repeating in a 16-day cycle. The findings are included in the pre-print of a paper on arXiv. Researchers from the Canadian Hydrogen Intensity Mapping Experiment (CHIME) under the Fast Radio Burst Project have noticed a pattern in a series of bursts coming from a single source half a billion light-years from Earth. Also read: Astronomers find relationship between colliding galaxies, black holes This pattern was detected between September 16, 2018 and October 30, 2019 in fast radio bursts (FRBs) which are millisecond-long bursts of radio waves in space. In the traced pattern, it used to send radio wave bursts for a period of four days, stopped for a period of 12 days, then this entire process was repeated. Usually, individual radio bursts emit once and don't repeat but repeating fast radio bursts are known to send out short, energetic radio waves multiple times. And usually when they repeat, it's sporadic or in a cluster, according to previous observations. Also see: In a first, water found on earth-like planet beyond our solar system Researchers are tracing the origin of these mysterious bursts but so far, they have traced myriad sources every burst. The first repeating fast radio burst traced, FRB 121102, linked back to a small dwarf galaxy containing stars and metals. FRB 180916 was traced to one of the spiral arms of a Milky Way-esque galaxy. It was also within a star-forming region of the arm, the researchers said. According to the researchers, the possible cause for such bursts to emit can be orbital motion of a star or an object that acts as a companion in the outskirts of the galaxy. Last year, the CHIME/FRB collaboration detected the sources of eight new repeating FRBs and its signal. This recurring signal was traced to a massive spiral galaxy approximately 500 million light years away.

Recurring radio signals heard from space after 16 days: Study

In a first, water found on earth-like planet beyond our solar system

Voyager 2, a NASA probe launched in 1977 and designed for just a five-year mission, has become only the second human-made object to enter interstellar space as it continues its marathon trek billions of miles (km) from Earth, scientists said on Monday.

Data from instruments aboard the spacecraft showed it crossed the outer edge of the heliosphere, a protective bubble of particles and magnetic fields produced by the sun, on November 5, the US space agency said.

The boundary crossed by the intrepid probe as it journeys a bit more than 11 billion miles (18 billion km) from Earth is called the heliopause, a place where the hot solar wind runs up against the interstellar medium, the soup of stuff residing between the stars of our Milky Way galaxy.

"This is a very exciting time again in Voyager's 41-year journey, so far, of exploring the planets and now the heliosphere and entering interstellar space," Ed Stone, Voyager project scientist based at Caltech, told a news briefing.

Voyager 2 was launched in 1977, 16 days before its twin probe Voyager 1, which reached interstellar space in 2012. Voyager 2's instrument called the Plasma Science Experiment (PLS) is able to provide observations of the nature of this region of space. While Voyager 1 is still going strong on its own journey in interstellar space, its PLS stopped working in 1980.

The Voyager probes were designed to last five years and study the giant gas planets Jupiter and Saturn. Their refusal to die has also let them study Uranus and Neptune, the solar system's outermost giant planets.

Both probes carry a phonograph record. The gold-plated copper disk bears sounds, images and spoken greetings in multiple languages to depict Earth's diversity of life and culture, intended to communicate with potential extraterrestrial beings who may encounter them.

The two probes have not officially exited the solar system, whose outermost region is a shell called the Oort Cloud comprised of numerous small icy objects still under the sun's gravitational influence.

"I often get asked, 'So, is this it for Voyager? You've crossed out of the heliopause. Is it done? Are we finished?' Absolutely not. This is really, for me, the beginning of a new era of heliophysics science," said Nicola Fox, director of the heliophysics division at NASA headquarters.

"We are fortunate enough to have two very brave sentinels that have left our heliosphere and are out truly looking at the other side of the boundary," Fox added.

Voyager 2, a NASA probe launched in 1977 and designed for just a five-year mission, has become only the second human-made object to enter interstellar space as it continues its marathon trek billions of miles (km) from Earth, scientists said on Monday.

Voyager 2, a NASA probe launched in 1977 and designed for just a five-year mission, has become only the second human-made object to enter interstellar space as it continues its marathon trek billions of miles (km) from Earth, scientists said on Monday. Data from instruments aboard the spacecraft showed it crossed the outer edge of the heliosphere, a protective bubble of particles and magnetic fields produced by the sun, on November 5, the US space agency said. The boundary crossed by the intrepid probe as it journeys a bit more than 11 billion miles (18 billion km) from Earth is called the heliopause, a place where the hot solar wind runs up against the interstellar medium, the soup of stuff residing between the stars of our Milky Way galaxy. "This is a very exciting time again in Voyager's 41-year journey, so far, of exploring the planets and now the heliosphere and entering interstellar space," Ed Stone, Voyager project scientist based at Caltech, told a news briefing. Voyager 2 was launched in 1977, 16 days before its twin probe Voyager 1, which reached interstellar space in 2012. Voyager 2's instrument called the Plasma Science Experiment (PLS) is able to provide observations of the nature of this region of space. While Voyager 1 is still going strong on its own journey in interstellar space, its PLS stopped working in 1980. The Voyager probes were designed to last five years and study the giant gas planets Jupiter and Saturn. Their refusal to die has also let them study Uranus and Neptune, the solar system's outermost giant planets. Both probes carry a phonograph record. The gold-plated copper disk bears sounds, images and spoken greetings in multiple languages to depict Earth's diversity of life and culture, intended to communicate with potential extraterrestrial beings who may encounter them. The two probes have not officially exited the solar system, whose outermost region is a shell called the Oort Cloud comprised of numerous small icy objects still under the sun's gravitational influence. "I often get asked, 'So, is this it for Voyager? You've crossed out of the heliopause. Is it done? Are we finished?' Absolutely not. This is really, for me, the beginning of a new era of heliophysics science," said Nicola Fox, director of the heliophysics division at NASA headquarters. "We are fortunate enough to have two very brave sentinels that have left our heliosphere and are out truly looking at the other side of the boundary," Fox added.

Watch: NASA's intrepid Voyager 2 probe crosses into interstellar space

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Recurring radio signals heard from space after 16 days: Study

In a first, water found on earth-like planet beyond our solar system

Watch: NASA's intrepid Voyager 2 probe crosses into interstellar space