Latest news with #Earth-sized
Scottish Sun
22-07-2025
- Science
- Scottish Sun
Terrifying new Earth-sized planet found with deadly secret that would instantly kill anyone visiting
Anything that lands there would be immediately incinerated NIGHTMARE WORLD Terrifying new Earth-sized planet found with deadly secret that would instantly kill anyone visiting A NEW Earth-sized planet has been discovered in a faraway constellation - and it would kill any astronaut who dare travel there. Some 117.4 light-years away from Earth, scientists have stumbled across a nightmarish alien world where the planet's surface is likely molten. 5 The surface of molten exoplanet Credit: Alamy 5 An artist's impression of a molten exoplanet Credit: Alamy The planet, dubbed TOI-2431, orbits quite close to its nearest star over a very short period, resulting in a high surface temperature. Unlike Earth, which has an orbital period of 365 days, TOI-2431 orbits its star in only 5.4 hours - making it one of the shortest period exoplanets ever discovered. The alien world, located in constellation Cetus, is thought to have a surface temperature of about 1,700C (3092F). Anything that lands there would be immediately incinerated. The international team of astronomers, led by Kaya Han Taş of the University of Amsterdam in the Netherlands, detected the new exoplanet orbiting a nearby star using Nasa's Transiting Exoplanet Survey Satellite (TESS). 5 Nasa's Transiting Exoplanet Survey Satellite (TESS) Credit: Nasa "We have confirmed the ultra-short period planet TOI-2431 b using a combination of photometric transit data from TESS, precise radial velocity observations with the NEID and HPF spectrographs, and ground-based speckle imaging with the NESSI instrument," researchers wrote in the new research paper. The Nasa tool monitors about 200,000 bright stars near Earth, scanning for hidden planets that might cause any blips of light as they pass their star. Just last week, researchers revealed they used TESS to follow a repetitive flicker of starlight to a new 'Super Earth' 154 light-years away. Since its launch in April 2018, the satellite has identified more than 7,600 possible exoplanets - which are nicknamed TESS Objects of Interest, or TOI. Exactly 638 of these have been confirmed as alien worlds so far. Best-ever sign of ALIEN life found on distant planet as scientists '99.7% sure of astounding biological activity signal' The planet's host star is only about two-thirds the size and mass of our Sun, and appears to be pulling the planet towards a fiery death. Researchers estimated that the planet has a tidal decay timescale of about 31 million years - which is fairly short in the grand schemes of the universe. Tidal decay causes a planet's orbit to gradually shrink and spiral towards its host star - eventually leading to its destruction. The 2billion-year-old host star, which researchers believe is roughly double the temperature of its nearby planet, will eventually collide with the planet. Researchers hope they can secure time with the James Webb Space Telescope (JWST) to study TOI-2431 b more closely. Doing so could shed more light on the planet's surface composition, and may answer the question of whether or not it has an atmosphere. The $10 billion telescope discovered its first-ever exoplanet just last month, but has been used to analyse others on its journey through space. 5 The James Webb Space Telescope (JWST) Credit: Alamy 5 An artist's impression of a molten exoplanet Credit: Alamy All you need to know about planets in our solar system Our solar system is made up of nine planets with Earth the third closest to the Sun. But each planet has its own quirks, so find out more about them all... How old is Earth? Plus other facts on our planet How many moons does Mercury have? What colour is Venus? How far away is Mars to Earth? And other facts on the red planet How big is Jupiter? How many moons does Saturn have? Does Uranus have rings? How many moons does Neptune have? How big is Pluto? How hot is the Sun?
Indian Express
22-07-2025
- Science
- Indian Express
Ahead of NASA's mission, James Webb telescope finds cues of a liquid water ocean under Europa's surface
Jupiter's icy moon Europa has been one of the most promising places in our solar system to find environments suitable for life beyond Earth. In the 1960s, ground-based telescopic observations noted that Europa's surface was mostly made of water ice, with scientists speculating that the almost Earth-sized moon has a saltwater ocean that holds twice as much water as our planet. Now, new observations from the James Webb Telescope (JWST) are revealing that Europa, which was often pictured as a still, silent shell actually has an active surface. In a series of experiments conducted by Southwest Research Institute, it was found that Europa's surface ice is crystallising at different rates in different places. This suggests that the planet is currently undergoing geologic activity, with scientists labelling the ongoing cycle between the subsurface and surface as 'chaos terrains'. The study focused on two regions located in Europa's southern hemisphere – Tar Regio and Powys Regio, with the latter often referred to as one of the most intriguing areas on the moon's surface. In these locations, the James Webb Telescope found crystallised ice both on the surface and below it. The experiments were crucial for scientists to understand how the ice transforms between different states. The result of these experiments, when combined with the newly received data from the James Webb Telescope, hints that Europa's subsurface may be hiding a huge liquid ocean beneath the surface. Scientists also found some clues that Europa may have Carbon Dioxide (CO2) and hydrogen peroxide. Upon further evaluation, it was found that CO2 on Europa's surface is unstable due to the moon's radioactive environment, which suggests that these geological processes were recent. Ujjwal Raut, a program manager at the Southwest Research Institute and the co-author of the study, said that the 'data showed strong indications that what we are seeing must be sourced from the interior, perhaps from a subsurface ocean nearly 20 miles (30 kilometers) beneath Europa's thick icy shell. The evidence for a liquid ocean underneath Europa's icy shell is mounting, which makes this so exciting as we continue to learn more.' In October last year, NASA launched Europa Clipper, a spacecraft that will explore Europa to determine if its underground ocean is habitable. However, the spacecraft will first head towards Mars and take around five and a half years to reach Jupiter's icy moon.
Yahoo
30-05-2025
- General
- Yahoo
Scientists Are Stumped by Mysterious Pulsing 'Star'
ASKAP J1832 (in circle) captured by th Chandra X-Ray Observatory Credit - X-ray: NASA/CXC/ICRAR, Curtin Univ./Z. Wang et al.; Infrared: NASA/JPL/CalTech/IPAC; Radio: SARAO/MeerKAT; Image processing: NASA/CXC/SAO/N. Wolk Something strange is going on 15,000 light years from Earth. Out at that distant remove, somewhere in the constellation Scutum, an unexplained body is semaphoring into space, blinking in both X-ray and radio frequencies once every 44 minutes in a way never seen by astronomers before. The object could be a white dwarf—an Earth-sized husk that remains after a star has exhausted its nuclear fuel. Or not. It could also be a magnetar—a neutron star with an exceedingly powerful magnetic field. Unless it's not that either. 'Astronomers have looked at countless stars with all kinds of telescopes and we've never seen one that acts this way,' said astronomer Ziteng Wang of Curtin University in Australia, in a statement that accompanied the May 28 release of a paper in Nature describing the object, for which he was lead author. 'It's thrilling to see a new type of behavior for stars.' So what exactly is the mysterious body—which goes by the technical handle ASKAP J1832—and how common is this species of object? ASKAP J1832 is by no means unique in the universe in sending out energy in steady flashes. Pulsars—rapidly spinning neutron stars—do too. But pulsars flash much faster than ASKAP J1832 does, on the order of milliseconds to seconds. In 2022, astronomers discovered a type of object known as a long-period transient, which, like ASKAP J1832, sends out flashes of radio waves on the order of tens of minutes. So far 10 such bodies have been found, but none identical to ASKAP J1832, which is the first to emit X-rays too. What's more, ASKAP J1832's emissions have changed over time. During one observation with NASA's orbiting Chandra X-Ray Observatory in February 2024, the object was prodigiously producing both X-rays and radio waves. During a follow-up observation six months later, the radio waves were 1,000 times fainter and no X-rays were detected. That was a puzzle. 'We looked at several different possibilities involving neutron stars and white dwarfs, either in isolation or with companion stars,' said co-author Nanda Rea of the Institute of Space Sciences in Barcelona, Spain, in a statement. 'So far nothing exactly matches up, but some ideas work better than others.' One of those ideas is the magnetar, but that doesn't fit precisely, due to ASKAP J1832's bright and variable radio emissions. The white dwarf remains a possibility, however in order to produce the amount of energy it does, ASKAP J1832 would have to be orbiting another body in a formation known as a binary system, and so far that second body hasn't been detected. Viewed from Earth, ASKAP J1832 appears to be located in a supernova remnant, a cloud of hot gas and high energy particles that remains after an aging star meets its explosive end. But the authors of the paper concluded that the remnant merely lies in the foreground of the observational field with ASKAP J1832 in the background, the way an earthly cloud can drift in the path of the sun. So for now, the object remains a riddle—one that will be investigated further. 'Finding a mystery like this isn't frustrating,' said co-author Tong Bao of the Italian National Institute for Astrophysics, in a statement. 'It's what makes science exciting.' Write to Jeffrey Kluger at
Time Magazine
30-05-2025
- Science
- Time Magazine
Scientists Are Stumped by Mysterious Pulsing ‘Star'
Something strange is going on 15,000 light years from Earth. Out at that distant remove, somewhere in the constellation Scutum, an unexplained body is semaphoring into space, blinking in both X-ray and radio frequencies once every 44 minutes in a way never seen by astronomers before. The object could be a white dwarf —an Earth-sized husk that remains after a star has exhausted its nuclear fuel. Or not. It could also be a magnetar —a neutron star with an exceedingly powerful magnetic field. Unless it's not that either. 'Astronomers have looked at countless stars with all kinds of telescopes and we've never seen one that acts this way,' said astronomer Ziteng Wang of Curtin University in Australia, in a statement that accompanied the May 28 release of a paper in Nature describing the object, for which he was lead author. 'It's thrilling to see a new type of behavior for stars.' So what exactly is the mysterious body—which goes by the technical handle ASKAP J1832—and how common is this species of object? ASKAP J1832 is by no means unique in the universe in sending out energy in steady flashes. Pulsars —rapidly spinning neutron stars—do too. But pulsars flash much faster than ASKAP J1832 does, on the order of milliseconds to seconds. In 2022, astronomers discovered a type of object known as a long-period transient, which, like ASKAP J1832, sends out flashes of radio waves on the order of tens of minutes. So far 10 such bodies have been found, but none identical to ASKAP J1832, which is the first to emit X-rays too. What's more, ASKAP J1832's emissions have changed over time. During one observation with NASA's orbiting Chandra X-Ray Observatory in February 2024, the object was prodigiously producing both X-rays and radio waves. During a follow-up observation six months later, the radio waves were 1,000 times fainter and no X-rays were detected. That was a puzzle. 'We looked at several different possibilities involving neutron stars and white dwarfs, either in isolation or with companion stars,' said co-author Nanda Rea of the Institute of Space Sciences in Barcelona, Spain, in a statement. 'So far nothing exactly matches up, but some ideas work better than others.' One of those ideas is the magnetar, but that doesn't fit precisely, due to ASKAP J1832's bright and variable radio emissions. The white dwarf remains a possibility, however in order to produce the amount of energy it does, ASKAP J1832 would have to be orbiting another body in a formation known as a binary system, and so far that second body hasn't been detected. Viewed from Earth, ASKAP J1832 appears to be located in a supernova remnant, a cloud of hot gas and high energy particles that remains after an aging star meets its explosive end. But the authors of the paper concluded that the remnant merely lies in the foreground of the observational field with ASKAP J1832 in the background, the way an earthly cloud can drift in the path of the sun. So for now, the object remains a riddle—one that will be investigated further. 'Finding a mystery like this isn't frustrating,' said co-author Tong Bao of the Italian National Institute for Astrophysics, in a statement. 'It's what makes science exciting.'
Indian Express
28-05-2025
- Science
- Indian Express
Scientists uncover new details about Uranus' atmosphere, strange seasons
Uranus, the seventh planet from the Sun, owes its pale blue-green in colour to its atmosphere which absorbs the red wavelengths of sunlight, according to a new study. The study was published by a research group comprising scientists from the University of Arizona in the US as well as other institutions. It sheds light on the atmospheric composition and complex dynamics governing the mystery planet. The researchers were able to provide new information about Uranus after analysing images of the planet captured by NASA's Hubble Space Telescope over the last 20 years. The Hubble images of Uranus were taken between 2002 and 2022. As per the study, Uranus' atmosphere is primarily composed of hydrogen and helium, along with small amounts of methane as well as minute quantities of water and ammonia. Uranus is located between Saturn and Neptune. As the seventh planet from the Sun, Uranus remains one of the least understood planets in our solar system which is why the new research study may be significant. Scientists who authored the study also provided more information about seasonal changes on the planet. Unlike other planets, Uranus' axis of rotation is nearly parallel to its orbital plane. It is likely that Uranus collided with an Earth-sized object, which might be the reason why it is said to be rotating in an 'overturned' position. As a result, it takes 84 years for the planet to complete one revolution around the Sun. This means that the surface of the planet gets sunshine for 42 years and the next 42-year-period is dark. Over the course of the 20-year-long study, researchers were able to observe only a part of the seasonal change of Uranus' atmosphere. The research builds on existing information about Uranus, like the fact that the planet is composed mainly of water and ammonia ice. It is approximately 51,000 kilometres in diameter, making Uranus four times bigger than the Earth with a mass that is 15 times greater than that of Earth's. Uranus also has 13 rings and 28 moons. NASA's Voyager 2 is the only space probe mission that has explored the planet by conducting a flyby in January 1986. However, the group of scientists behind the new study said that they will continue to observe Uranus and gather more information on seasonal changes in its polar regions.
