Latest news with #EliseWrightKnutsen
Yahoo
18-05-2025
- Science
- Yahoo
First aurora photo from Mars shows green glow in the sky
Something new for the Martian tourist brochures: You might get to see auroras. In March 2024, for the first time, scientists observed a visible green aurora on Mars. Although scientists had already detected many different types of auroras on Mars, they had all appeared at ultraviolet wavelengths invisible to the naked eye. Scientists connected the green aurora's appearance to high-energy particles sent by a solar storm eruption. All planets with atmospheres in the Solar System experience auroras, created by the interaction of magnetic fields with high-energy particles from the sun. Auroras occur, both on Earth and Mars, when energetic particles from space rain down on the upper atmosphere, according to NASA. On Earth, these particles are guided toward the poles by our planet's global magnetic field. That's why auroras are seen most often around the Arctic and Antarctic. On Mars, there is no organized planetary magnetic field to guide the particles north and south, so they can go anywhere. 'The presence of visible aurora opens a new avenue for the study of space weather events at Mars,' according to a new study published May 14 in the journal Science Advances. The study was led by Elise Wright Knutsen of the University of Oslo in Norway. Using instruments aboard the Perseverance rover, researchers documented the first visible aurora during a solar storm eruption in 2024. They tied the aurora, which appeared on March 18, 2024, to a coronal mass ejection from an intense solar storm. The aurora appeared three days after the storm's eruption on March 15, which suggests the aurora was born from charged energetic particle interactions as the shock front reached the Martian magnetosphere. This article originally appeared on USA TODAY: An aurora was spotted on Mars and this photo shows a green glow
Yahoo
17-05-2025
- Science
- Yahoo
NASA rover captures an aurora from Mars surface for the first time
NASA's Perseverance rover has captured an aurora in the night sky for the first time from the Martian ground. Scientists have known for two decades that Mars' skies have auroras, too, but these curtains of undulating light had only been detected in ultraviolet — light that is invisible to the naked eye — until now. All previous Martian auroras were observed from orbiters in space. The result is a grainy portrait, shown farther down in this story, reminiscent of the snow one might remember seeing on an old television when it lost a signal. But it represents a monumental achievement, said Elise Wright Knutsen, first author of the research from the University of Oslo in Norway. A paper on the unprecedented observation was published in the journal Science Advances on May 14. "The photo was taken with an instrument not necessarily optimized for nighttime imagery, and so it isn't like the spectacular aurora images we have from Earth," Knutsen told Mashable. "But hopefully people will appreciate the softly glowing green sky, regardless of the image being rather pixelated." SEE ALSO: Watch how an old Venus spacecraft tumbled before crashing to Earth The actual images taken by Perseverance, whose instruments are not optimized for nighttime viewing, were not as glamorous as this artist's depiction, but the detection was a monumental achievement, researchers said. Credit: Alex McDougall-Page illustration When the sun releases radiation during a solar storm, charged particles travel along a planet's invisible magnetic field lines. When these particles strike gases in the atmosphere, they heat up and glow. The side effects are colorful light displays known as auroras. On Earth, the colors differ depending on the type of atmospheric gas and its altitude. Oxygen glows red or blue, while nitrogen can create green, blue, or pink. The recent strong solar storm conditions — a by-product of the sun being at solar maximum — are causing auroras around the North Pole, known as the Northern Lights, to sprawl, allowing people who live farther south to see them. Mars' magnetic field is different from Earth's, and so the auroras are quite exotic. They aren't tethered to the polar regions of the planet. Instead, the Red Planet's auroras can be found in a hodgepodge of places and come in at least four varieties: localized discreet auroras, global diffuse auroras, proton auroras on the side facing the sun, and a large wormlike aurora stretching to the nightside of the planet. Some of the auroras sprout from the ground, thought to form around what's left of the ancient magnetic field in the planet's crust. Perseverance, which is exploring Jezero crater, where a river once emptied into a delta, spotted the aurora on March 18, 2024. The sun had blasted a torrent of energy expected to reach Mars, said UC Berkeley's Rob Lillis, who isn't an author on the new paper, in a 2024 Mashable interview. NASA's Perseverance rover took the first image of an aurora, left, from the surface of Mars on March 18, 2024. The image, right, is the sky without an aurora for comparison. Credit: Knutsen et al. / Sci. Adv. 11 / eads1563 (2025) But no one was sure of what exactly the rover would see, given there were so many variables, including timing and weather: Getting one of these night sky displays would be like catching lightning in a bottle. "We actually told the rover team to point their camera upwards and see if they could see an aurora," he said, "and they got the word just barely in time to send the command to go and look up." Perseverance used a special camera, called Mastcam-Z, and a laser tool, known as SuperCam, to observe the faint green haze. Though the glow was dim, the detection suggests that, under better viewing conditions, astronauts could one day see such a light display with their own eyes. In fact, that's one crucial reason why scientists bother studying these extraterrestrial auroras. In order for astronauts to land on Mars and explore one day, they'll need navigation and communication systems that pass signals through the planet's upper atmosphere. The more accurate scientists' models are of Mars' ionosphere, the layer of charged particles surrounding the planet, the better those technologies will work. Twin orbiters built for the Escapade mission will attempt to take the first global images of Martian auroras in visible light. Credit: Rocket Lab Scientists are planning more ways to capture Martian auroras. A NASA-funded robotic mission, called Escapade, will seek to get to the bottom of how solar radiation strips away the tattered Martian atmosphere. The mission will involve two orbiters built by Rocket Lab, said Lillis, the principal investigator. Though the United Arab Emirates' orbiter Hope has already obtained global images in ultraviolet light, with any luck, the Escapade probes will take the first global snapshots of Martian auroras in visible light. After several previous failed attempts, the rover's detection last year was a boon, said Knutsen, who personally longs to explore space. She even applied to the European Space Agency's astronaut program a few years ago. "I would give my left foot to have been there to see it myself," she said, "but I hope one day I can retire under a softly glowing green Martian sky."
Express Tribune
16-05-2025
- Science
- Express Tribune
NASA rover observes aurora on Mars
The first visible-light image of a green aurora on Mars (left), taken by NASA's Perseverance rover, is seen next to a comparison image showing the night sky without the aurora but featuring the Martian moon Deimos (right). PHOTO: REUTERS NASA's Perseverance rover has observed an aurora on Mars in visible light for the first time, with the sky glowing softly in green in the first viewing of an aurora from any planetary surface other than Earth. Scientists said the aurora occurred on March 18, 2024, when super-energetic particles from the sun encountered the Martian atmosphere, precipitating a reaction that created a faint glow across the entire night sky. Auroras have been observed previously on Mars by satellites from orbit in ultraviolet wavelengths, but not in visible light. The sun three days earlier had unleashed a solar flare and an accompanying coronal mass ejection - a huge explosion of gas and magnetic energy that brings with it large amounts of solar energetic particles - that traveled outward through the solar system. Mars is the fourth planet from the sun, following Mercury, Venus and Earth. Scientists had simulated the event in advance and prepared instruments on the rover to be ready to observe the expected aurora. Perseverance has two instruments that are sensitive to wavelengths in the visible range, meaning they detect colors human eyes can see. The researchers used the rover's SuperCam spectrometer instrument to identify exactly the wavelength of the green glow and then used its Mastcam-Z camera to take a snapshot of the softly glowing green sky. An aurora forms on Mars the same way as on Earth, with energetic charged particles colliding with atoms and molecules in the atmosphere, exciting them, and causing subatomic particles called electrons to emit light particles called photons. "But on Earth, the charged particles are channeled into the polar regions by our planet's global magnetic field," said Elise Wright Knutsen, a postdoctoral researcher at the University of Oslo's Center for Space Sensors and Systems and lead author of the study published this week in the journal Science Advances. "Mars has no global magnetic field so the charged particles bombarded all of Mars at the same time, which leads to this planet-wide aurora," Knutsen added. The green color occurred because of the interaction between the charged particles from the sun and oxygen in the Martian atmosphere. While auroras can be brilliant, as often seen in Earth's northernmost and southernmost regions, the one observed on Mars was quite faint. "This specific aurora we observed on March 18th of last year would have been too faint for humans to see directly.
NDTV
15-05-2025
- Science
- NDTV
NASA Rover Observes Aurora On Mars In Visible Light For First Time
Washington: NASA's Perseverance rover has observed an aurora on Mars in visible light for the first time, with the sky glowing softly in green in the first viewing of an aurora from any planetary surface other than Earth. Scientists said the aurora occurred on March 18, 2024, when super-energetic particles from the sun encountered the Martian atmosphere, precipitating a reaction that created a faint glow across the entire night sky. Auroras have been observed previously on Mars by satellites from orbit in ultraviolet wavelengths, but not in visible light. The sun three days earlier had unleashed a solar flare and an accompanying coronal mass ejection - a huge explosion of gas and magnetic energy that brings with it large amounts of solar energetic particles - that traveled outward through the solar system. Mars is the fourth planet from the sun, following Mercury, Venus and Earth. Scientists had simulated the event in advance and prepared instruments on the rover to be ready to observe the expected aurora. Perseverance has two instruments that are sensitive to wavelengths in the visible range, meaning they detect colors human eyes can see. The researchers used the rover's SuperCam spectrometer instrument to identify exactly the wavelength of the green glow and then used its Mastcam-Z camera to take a snapshot of the softly glowing green sky. An aurora forms on Mars the same way as on Earth, with energetic charged particles colliding with atoms and molecules in the atmosphere, exciting them, and causing subatomic particles called electrons to emit light particles called photons. "But on Earth, the charged particles are channelled into the polar regions by our planet's global magnetic field," said Elise Wright Knutsen, a postdoctoral researcher at the University of Oslo's Center for Space Sensors and Systems and lead author of the study published this week in the journal Science Advances. "Mars has no global magnetic field so the charged particles bombarded all of Mars at the same time, which leads to this planet-wide aurora," Knutsen added. The green color occurred because of the interaction between the charged particles from the sun and oxygen in the Martian atmosphere. While auroras can be brilliant, as often seen in Earth's northernmost and southernmost regions, the one observed on Mars was quite faint. "This specific aurora we observed on March 18th of last year would have been too faint for humans to see directly. But if we get a more intense solar storm, it could become bright enough for future astronauts to see. And with a camera, such as an iPhone, you would clearly see it, rather like how an aurora on Earth is always brighter in images than with the naked eye," Knutsen said. This particular event did not impact Earth. All the planets with atmospheres in our solar system experience auroras. "Various types and wavelengths of aurora have been observed previously from Mars-orbiting satellites. All previous observations have been in the UV, but they have had wildly different shapes. From the global, diffuse aurora we observed now, to discrete arcs and patches near the crustal fields (regional magnetic fields) in the south, and large-scale sinuous shapes," Knutsen said. If astronauts from Earth visit Mars and perhaps establish a long-term presence on the planet's surface, they may be treated to a nighttime light show. "During a more intense solar storm, producing a brighter aurora, I think a sky which glows green from horizon to horizon will be eerily beautiful," Knutsen said. "The aurora will appear as a soft green glow covering more or less the whole sky," Knutsen added. "Dust in the lower part of the atmosphere would obscure some of the light towards the horizon, and if you looked straight up it would also be fainter simply because looking at a slant angle will allow you to see through a thicker section of the atmosphere that is emitting the aurora."
Time of India
15-05-2025
- Science
- Time of India
Nasa rover spies first aurora at Mars that's visible to human eye
. NEW YORK: Nasa's Perseverance rover has detected the first aurora at Mars that's visible to the human eye, good news for future astronauts who can savour the view on the red planet. European and US scientists reported that the green aurora in the dusty Martian sky was generated by a solar storm last year and had three days' advance notice to set aside viewing time with the rover's cameras. Previous auroras observed at Mars appeared only in the ultraviolet, but this one was in the visible wavelength. It resulted from a solar flare in March 2024 that was followed by a coronal mass ejection of plasma from the sun that was directed toward Mars. These latest observations show that forecasting of northern and southern lights is now possible at Mars, allowing scientists to study space weather, said University of Oslo's Elise Wright Knutsen , whose research appeared Wednesday in the journal Science Advances. "While the brightness of this event was dimmed by dust, events under better viewing conditions or more intense particle precipitation might be above the threshold for human vision and visible to future astronauts," the researchers wrote. by Taboola by Taboola Sponsored Links Sponsored Links Promoted Links Promoted Links You May Like Viral Video: मृत्यू कसाही येऊ शकतो! सीसीटीव्हीत कैद झाली काळीज पिळवटणारी घटना Latest News Read More Undo This was the first time an aurora had been reported from the surface of a planet other than Earth, the researchers noted. Earlier observations were made from orbit. Launched in 2020, Perseverance has been exploring Mars' Jezero Crater since 2021, collecting dust and rock samples for eventual return to Earth. The region, now dry but once believed to be a flowing lake and river delta, could hold evidence of ancient microbial life.
