NASA's Juno Probe Unlocks Secrets of Jupiter's Unusual Lightning Storms

09 Juin, 2018, 11:59 | Auteur: Therese Cote
  • Space								Image Source NASA

Scientists believe Juno was able to pick up the megahertz signatures because its flyby put it closer to the lightning than any spacecraft before it. The Juno mission, however, gave researchers a chance to dig deeper into Jupiter's lightning. The image is based on a JunoCam image.

That said, it is worth noting that while the nature and frequency of lightning strikes on Jupiter is more similar to Earth's than scientists thought, the location of the phenomenon is completely different.

"Until Juno, all the lightning signals recorded by spacecraft were limited to either visual detections or from the kilohertz range of the radio spectrum, despite a search for signals in the megahertz range", Mr Brown explained.

Enter NASA's Juno orbiter.

In particular, the Microwave Radiometer Instrument, which can detect radio emissions in a wide range of frequencies.

On Jupiter, lightning is clustered in the polar regions - it's "inside-out" relative to Earth, Brown said.

The first time you approach the planet, the spacecraft has recorded 377 of the lightning discharges, such as those that occur on Earth.

Still, we must keep in mind that a significant difference between Earth's lightning and Jupiter's remains.

Victoria Beckham puts family first with sweet pic as hubby David works
The former Spice Girl shared a sweet message revealing she was anxiously awaiting her husband's return. The athlete insisted he and his wife genuinely care for one another and their love keeps them together.

China hosts Russia, Iran for summit as U.S. tensions rise
After their informal meeting in Wuhan last month, PM Modi and President Xi will hold their first bilateral meeting on Saturday. It is also keen on deepening its security-related cooperation with the SCO and its Regional Anti-Terrorism Structure.

Roland-Garros : la finale opposera Rafael Nadal à Dominic Thiem dimanche
J'ai progressé au fil de la quinzaine. "Ce sera dur mais je serai prêt", a prévenu le no 1 mondial. Ce vendredi, ça a déménagé sur le Central lors des deux demi-finales masculines.

"There is a lot of activity near Jupiter's poles but none near the equator. You can ask anybody who lives in the tropics - this doesn't hold true for our planet". At the equator, it's just warm enough that warm gas doesn't rise, but at the poles the gusts are lifted, driving convection to create lightning. It brought to light many new facts associated with the huge gas world including- the red spot's depth, the 3D imagery of gas underneath the surface of the planet, and the functionality of Jupiter's auroras. As Choi reports, scientists have speculated many reasons behind the difference, including variations in the atmosphere or even fundamental distinctions between how lightning forms. This means that even though the poles of Jupiter are actually colder than its equatorial belt, the heat from within the planet tends to drive convection of the lower atmosphere and provides moist, warm air for thunderstorms.

"These findings could help to improve our understanding of the composition, circulation, and energy flows on Jupiter", Brown concluded. But another question looms, she said. "We can't explain why we see almost twice the amount of lightning in the Northern Hemisphere of Jupiter than we do in the Southern Hemisphere", Brown said.

In a separate paper published in Nature, a team of researchers led by Ivana Kolmašová of the Czech Academy of Sciences in Prague presented the largest database of low-frequency lightning-generated emissions collected to date.

The team, making use of Juno's Waves plasma and radio wave detector, discovered over 1,600 instances of lightning with peak rates of four strikes per second, Gizmodo reported.

"To really understand Jupiter, you need to map it", said Scott Bolton, principal investigator and associate vice president at the Southwest Research Institute. "Our unique orbit allows our spacecraft to fly closer to Jupiter than any other spacecraft in history, so the signal strength of what the planet is radiating out is a thousand times stronger".

Shannon Brown et al.

But there's one more way lightning on Jupiter is similar to Earth lightning. NASA's Juno spacecraft has found Jovian lightning produces the same sort of radio emissions as those on Earth, but they only seem to occur at the poles.

Conseillé:



Populaire

New coastline emerges as Kilauea pumps more lava to the sea
It has forced the shutdown of a geothermal energy plant that normally provides about a quarter of the island's electricity. The eruptions began early last month and is believed to be the volcano's most destructive episode in modern history.

DRC warlord Bemba 18-year jail sentence overturned
He said Bemba would probably go to Belgium to meet with his family there before returning to Congo after he is released. However, the Appeals Chamber of the ICC ruled that he could not be held responsible for crimes committed by his troops.

Avant un G7 difficile, Macron et Trudeau unis face à Trump
Trudeau et Trump, qui doivent s'entretenir vendredi, auront "beaucoup de choses à se dire", a-t-il ajouté. Vendredi, ce dernier s'est dit "d'accord" avec Donald Trump , qui a appelé le G7 à réintégrer la Russie.

Outbreaks in 36 States Linked to Backyard Poultry
Pre-cut melons have been removed from the shelves in both store chains, while whole melons do not appear to be affected. In rare cases, Salmonella infection can cause death unless the person is treated promptly with antibiotics.

No direct Eagles response to Trump as Philadelphia mayor blasts president
Trump then tweeted on the matter, writing: "Only a small number of players made a decision to come, and we cancelled the event". After the event was canceled, Trump invited Eagles fans to a " Celebration of America " on the White House lawn instead.

Le choc Del Potro - Nadal à Roland-Garros en direct
Il y aura forcément beaucoup de pression, ça sera une finale de Grand Chelem, j'ai déjà laissé beaucoup d'énergie derrière moi. L'Autrichien, numéro 7 mondial, a éliminé en trois sets et 2h17 de jeu Marco Cecchinato (7-5, 7-6 [10], 6-1).

Au G7, la meilleure défense de Trump, c'est l'attaque
Déjà mercredi, il avait lancé comme un avertissement l'adresse de son partenaire américain: "Aucun dirigeant n'est éternel". Même tonalité chez Emmanuel Macron qui a multiplié les tweets contre "la loi du plus fort " et toute " hégémonie ".

Happy election day, Timmins! Here's what you need to know to vote
This is done by declaring out loud that you would like to decline your right to vote when the official hands you a ballot. If you're not on the list, a driver's license, photo ID card, utility bill, bank statement or T-4 slip will do just fine.

Dominic Thiem blasts Austrian military service
Thiem "plays very heavy topspin, very aggressive, goes for the shots, [has] fitness, condition", Moya said. At least Thiem can boast being the only man to have defeated Nadal on clay in the last two years.

Amazon achète 20 matchs par saison — Premier League
Pour avoir accès à Amazon Prime il faut tout de même débourser 79 livres (90,1 euros) par an ou 7,99 livres (9,1 euros) par mois. La LFP et la Ligue 1 espéraient que ces opérateurs se porteraient candidats pour quelques-uns des lots mis en vente récemment.