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Perseverance Mars rover captures first visible-light auroras throughout intense photo voltaic storm

May 14, 2025
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Perseverance Mars rover captures first visible-light auroras throughout intense photo voltaic storm
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Observes first visible-light auroras at Mars
The primary visible-light picture of a inexperienced aurora on Mars, left, taken by NASA’s Perseverance rover. A comparability picture, proper, exhibits the evening sky with out the aurora however that includes the Martian moon Deimos. Credit score: NASA/JPL-Caltech/ASU/MSSS/SSI

On March 15, 2024, close to the height of the present photo voltaic cycle, the solar produced a photo voltaic flare and an accompanying coronal mass ejection (CME), an enormous explosion of fuel and magnetic power that carries with it massive quantities of photo voltaic energetic particles. This photo voltaic exercise led to beautiful auroras throughout the photo voltaic system, together with at Mars, the place NASA’s Perseverance Mars rover made historical past by detecting them for the primary time from the floor of one other planet.

“This thrilling discovery opens up new potentialities for auroral analysis and confirms that auroras could possibly be seen to future astronauts on Mars’ floor,” stated Elise Knutsen, a postdoctoral researcher on the College of Oslo in Norway and lead creator of the Science Advances study, which reported the detection.

Choosing the right aurora

On Earth, auroras kind when photo voltaic particles work together with the worldwide magnetic area, funneling them to the poles the place they collide with atmospheric gases and emit mild. The commonest coloration, inexperienced, is attributable to excited oxygen atoms emitting mild at a wavelength of 557.7 nanometers. For years, scientists have theorized that inexperienced mild auroras may additionally exist on Mars however recommended they might be a lot fainter and tougher to seize than the inexperienced auroras we see on Earth.

Because of the purple planet’s lack of a world magnetic area, Mars has various kinds of auroras than these we’ve got on Earth. One in all these is photo voltaic energetic particle (SEP) auroras, which NASA’s MAVEN (Mars Ambiance and Unstable EvolutioN) mission found in 2014. These happen when super-energetic particles from the solar hit the Martian ambiance, inflicting a response that makes the ambiance glow throughout the entire evening sky.

Whereas MAVEN had noticed SEP auroras in ultraviolet mild from orbit, this phenomenon had by no means been noticed in seen mild from the bottom. Since SEPs sometimes happen throughout photo voltaic storms, which improve throughout photo voltaic most, Knutsen and her group set their sights on capturing seen photographs and spectra of SEP aurora from Mars’ floor on the peak of the solar’s present photo voltaic cycle.

Coordinating the picture-perfect second

Via modeling, Knutsen and her group decided the optimum angle for the Perseverance rover’s SuperCam spectrometer and Mastcam-Z digital camera to efficiently observe the SEP aurora in seen mild. With this statement technique in place, all of it got here all the way down to the timing and understanding of CMEs.

“The trick was to select a superb CME, one that might speed up and inject many charged particles into Mars’ ambiance,” stated Knutsen.

That’s the place the groups at NASA’s Moon to Mars (M2M) Area Climate Evaluation Workplace and the Group Coordinated Modeling Middle (CCMC), each positioned at NASA’s Goddard Area Flight Middle in Greenbelt, Maryland, got here in. The M2M group gives real-time evaluation of photo voltaic eruptions to the CCMC for initiating simulations of CMEs to find out if they may affect present NASA missions. When the simulations counsel potential impacts, the group sends out an alert.

On the College of California, Berkeley, area physicist Christina Lee obtained an alert from the M2M workplace in regards to the March 15, 2024, CME. Lee, a member of the MAVEN mission group who serves because the area climate lead, decided there was a notable photo voltaic storm heading towards the purple planet, which may arrive in just a few days. She instantly issued the Mars Area Climate Alert Notification to at present working Mars missions.

“This permits the science groups of Perseverance and MAVEN to anticipate impacts of interplanetary CMEs and the related SEPs,” stated Lee.

“After we noticed the energy of this one,” Knutsen stated, “we estimated it may set off aurora vivid sufficient for our devices to detect.”

A number of days later, the CME impacted Mars, offering a lightshow for the rover to seize, displaying the aurora to be practically uniform throughout the sky at an emission wavelength of precisely 557.7 nm. To verify the presence of SEPs through the aurora statement, the group seemed to MAVEN’s SEP instrument, which was moreover corroborated by information from ESA’s (European Area Company) Mars Categorical mission. Knowledge from each missions confirmed that the rover group had managed to efficiently catch a glimpse of the phenomenon within the very slender time window accessible.

“This was a incredible instance of cross-mission coordination. All of us labored collectively shortly to facilitate this statement and are thrilled to have lastly gotten a sneak peek of what astronauts will be capable to see there some day,” stated Shannon Curry, MAVEN principal investigator and analysis scientist on the Laboratory for Atmospheric and Area Physics (LASP) on the College of Colorado Boulder (CU Boulder).

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The way forward for auroras on Mars

By coordinating the Perseverance observations with measurements from MAVEN’s SEP instrument, the groups may assist one another decide that the noticed 557.7 nm emission got here from photo voltaic energetic particles. Since this is similar emission line because the inexperienced aurora on Earth, it’s seemingly that future Martian astronauts would be capable to see one of these aurora.

“Perseverance’s observations of the visible-light aurora affirm a brand new strategy to research these phenomena that is complementary to what we will observe with our Mars orbiters,” stated Katie Stack Morgan, performing challenge scientist for Perseverance at NASA’s Jet Propulsion Laboratory in Southern California. “A greater understanding of auroras and the circumstances round Mars that result in their formation are particularly vital as we put together to ship human explorers there safely.”

Extra info:
Elise W. Knutsen et al, Detection of visible-wavelength aurora on Mars, Science Advances (2025). DOI: 10.1126/sciadv.ads1563

Quotation:
Perseverance Mars rover captures first visible-light auroras throughout intense photo voltaic storm (2025, Could 14)
retrieved 14 Could 2025
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