Jupiter's poles are covered in Earth-sized swirling storms that are densely clustered and rubbing together, reveals first science results from NASA's Juno mission to the largest planet in our solar system.

"We're puzzled as to how they could be formed, how stable the configuration is, and why Jupiter's north pole doesn't look like the south pole," said Scott Bolton, Juno principal investigator from the Southwest Research Institute in San Antonio.

  1. The results also showed that Jupiter's magnetic field is even stronger than models expected, and more irregular in shape.
  2. Measurements of the massive planet's magnetosphere, from Juno's magnetometer investigation (MAG) indicates the magnetic field greatly exceeded expectations at 7.766 Gauss, about 10 times stronger than the strongest magnetic field found on Earth.
  3. Juno is giving us a view of the magnetic field close to Jupiter that we've never had before.
  4. Launched on August 5, 2011, Juno entering Jupiter's orbit on July 4, 2016.
  5. The findings from the first data-collection pass, which flew within about 4,200 kilometres of Jupiter's swirling cloud tops on August 27, were published in the journal Science.
  6. Juno also is designed to study the polar magnetosphere and the origin of Jupiter's powerful auroras -- its northern and southern lights.
  7. These auroral emissions are caused by particles that pick up energy, slamming into atmospheric molecules.
  8. Juno's initial observations indicate that the process seems to work differently at Jupiter than at Earth.
  9. Juno is in a polar orbit around Jupiter, and the majority of each orbit is spent well away from the gas giant.