Astronomers Discover Exceptionally Symmetrical Supernova Remnant Teleios
A Supernova remnant (SNR) with exceptional circular symmetry has been spotted by an international team of researchers. Supernova remnants (SNRs) are the remains of a supernova explosion, seen as diffuse,expanding structures. Observations show that SNRs harbor ejected material expanding from the supernova explosion. They also contain other interstellar material that has been swept up by the passage of the shockwave from the exploded star. This rather unusual SNR is named “Teleios”, the Greek term of perfect. The newfound SNR, officially designated as G305.4–2.2 was identified in the radio-continuum images of the Australian Square Kilometre Array Pathfinder (ASKAP) Evolutionary Map of the Universe (EMU).
Unusual structure and properties
According to the research paper describing the “Teleios”, it stands out for its unusual symmetrical structure. SNRs generally are unsymmetrical due to uneven distribution of the interstellar medium (ISM) they expand into. A few remnants like lSNR J0624–6948, SN1987A, or MC SNR J0509–6731 exhibit similar morphology
According to the paper, G305.4–2.2 or “Teleios” is located at a distance of 7,170 or 25,100 light years away, corresponding to a diameter of 45.6 or 156.5 light years, respectively. The study found some extended radio emission inside the southeastern edge of Teleios’s shell. This suggests that at least some parts of this region might be affected by the interaction of Teleios with local interstellar medium (ISM) structures. A steep spectral index of -0.6 suggests the remnant is either relatively young or very old and exhibits low surface brightness. These features make Teleios a compelling target for deeper investigation.
Possible Origins and Future Research
The study’s authors propose that Teleios likely originated from a Type Ia supernova, possibly formed below the Milky Way’s galactic plane. However, no direct evidence currently confirms this hypothesis. To uncover more about Teleios’s origin and evolution, the researchers recommend future high-resolution, multi-frequency observations.
These could reveal its expansion velocity and provide a clearer picture of its age and composition. Such efforts would not only enhance understanding of this unique remnant but also offer broader insights into the diversity and behaviour of supernova explosions in our galaxy.
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In a major fillip to Pakistan’s space and disaster management applications, China Thursday launched the first ever Remote Sensing Satellite-1 (PRSS-01) exclusively for Pakistan. The satellite was carried into orbit on a Kuaizhou-1A rocket from the Xichang Satellite Launch Centre in Sichuan province. PRSS-01 was injected into the intended orbit after liftoff, and all systems were declared functioning properly. The satellite will be used to support agriculture and land surveys, urban planning, emergency disaster response, as well as environmental monitoring scans for the country, and marks a new beginning in Pakistan’s ambitions of a space program. It also highlights persistent cooperation between China and Pakistan in technology associated with space science, as well as earth observation.
Earth Observation and Disaster Management
According to the official website, PRSS-01 is equipped with high-resolution imaging systems capable of providing detailed data across a wide range of civilian and governmental uses. Its uses consist of national land survey, urban planning, and real-time environmental monitoring. Crucially, it increases Pakistan’s ability to respond rapidly and efficiently when natural disasters such as floods or earthquakes occur. It is anticipated that the technology will be valuable in long-term infrastructure planning and will promote smarter, sustainable development across the country.
Strengthening Bilateral Space Cooperation
The PRSS-01 launch indicates that the strategic cooperation between China and Pakistan is deepening, in aerospace technology as well. Engineers from the two countries worked closely together throughout the development and launch processes, including substantial technological support from China. The mission will continue the spirit of collaboration evident in satellite communications and scientific payloads between China, Pakistan, and Algeria, strengthening confidence among partners.
The successful launch of PRSS-01 is not only a great leap for Pakistan in promoting national development, but also an important step towards China’s deepening cooperation with countries along the Belt & Road Initiative (BRI) and its aerospace industry transforming from being big to strong. With the launch of PRSS-01, industry expects a new era in improved satellite services for Pakistan.
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The concept of a large, hidden planet or planets lurking in the most distant regions of our solar system has been known since before Pluto’s discovery on 1930s. Originally named “Planet X,” it had been proposed to account for irregularities in Uranus’s orbit. That mystery was eventually resolved by recalculating Neptune’s mass. But in 2016, Caltech astronomers Konstantin Batygin and Mike Brown resurrected the puzzle with a new idea — Planet Nine — which was based on the bizarre orbits of distant Kuiper Belt objects. The explanation is that a huge planet far away is gravitationally pulling on these objects.
The Case for Planet Nine
According to Batygin and Brown’s observation, many of the Kuiper Belt objects don’t travel on orbits as expected. This suggests that, like the Moon (whose outward spiral from Earth is due to earth’s gravity), these distant objects are somehow being perturbed by something other than our Sun. The hypothesised Planet Nine is believed to be several times the size of Earth and orbiting out beyond Neptune. Supporting evidence are the discovery of recently detected trans-Neptunian-object with elliptical-orbits (such as 2017 OF201 ) which could have been sculpted by a massive planet.
In 2024, Brown reaffirmed confidence in the theory, stating, “There are currently no other explanations for the effects that we see.” More trans-Neptunian discoveries keep pointing toward an unknown gravitational force.
Challenges and New Clues
However, the theory faces hurdles. Other astronomers contend that there is not enough data on the Kuiper Belt to warrant a Planet Nine. Others suggest alternative explanations, such as a debris ring or even something more exotic like a small black hole. One is reduced observing time; tens of thousands of years are required for these objects so far from our planet to orbit.
Recent finds, such as the sednoid 2023 KQ14 — so elongated that it looks stable in an empty solar system — complicate the scenario even more. If Planet Nine is out there, it could be at least 500 AU away from the Sun. In the meantime, astronomers are continuing to search those huge, remote edges of our solar system using ground- and space-based telescopes.
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