Side-by-side images from flybys of Europa show close-up views of Jupiter's icy moon over 20 years




  • In Science
  • 2022-09-29 21:56:21Z
  • By Business Insider
 
Raw image of Europa, taken on September 29, 2022 by NASA
Raw image of Europa, taken on September 29, 2022 by NASA's Juno spacecraft.  
  • NASA's Juno probe zipped by Jupiter's icy moon Europa on Thursday.

  • Researchers observed Europa's surface and the ocean underneath the moon's icy crust.

  • Astronomers say the new data will inform future missions to the moon to study its subsurface ocean.

On Thursday morning, NASA's Juno spacecraft flew within 219 miles of the surface of Europa, a large icy moon that orbits Jupiter. It's humanity's closest look at the frozen world in more than 20 years.

The Juno mission launched in 2011 to study Jupiter, the largest planet in the solar system. After it successfully completed its primary mission in 2021, the Juno team used the probe to learn about Jupiter's moons, including Europa, Ganymede, and Io.

An image of Jupiter
An image of Jupiter's moon Europa captured by the Juno spacecraft on October 16, 2021.  

During Thursday's flyby, Juno made important observations about Europa, including taking high-resolution images of its surface. Juno's visit follows NASA's Galileo spacecraft, which last flew by Europa in 2000.

"This first picture is just a glimpse of the remarkable new science to come from Juno's entire suite of instruments and sensors that acquired data as we skimmed over the moon's icy crust," Scott Bolton, Juno principal investigator, said in a press release.

The first raw images from Juno's close approach to Europa started beaming back to Earth Thursday afternoon. The fresh snapshots, along with decades-old images taken by the Galileo spacecraft, provide important insights about the frozen world.

Europa, two decades after our last visit

At 5:36 a.m. ET, the spacecraft made its closest approach to Europa, zipping by 219 miles above the surface. Juno was in Europa's shadow, but sunlight reflecting off Jupiter provided enough light for the probe's camera to capture images.

On the left, an approximate natural color image of Europa taken by the Galileo spacecraft.
On the left, an approximate natural color image of Europa taken by the Galileo spacecraft.  

The above left image, taken by Galileo in 1997, is an approximate natural color image of Europa and showcases the stunning diversity of Europa's surface geology. Above right is a raw image of the Juno probe looking toward Europa on September 29. Both images show long linear cracks and ridges traversing the moon's surface.

After processing the new images, researchers hope comparing them to images of Europa from previous missions could reveal how the icy moon has changed over decades.

"The science team will be comparing the full set of images obtained by Juno with images from previous missions, looking to see if Europa's surface features have changed over the past two decades," Candy Hansen, a Juno co-investigator who leads planning for JunoCam, the probe's visible light camera, said in a press release.

"The JunoCam images will fill in the current geologic map, replacing existing low-resolution coverage of the area."

Europa has an ice shell, which is thought to be between 10 and 15 miles thick. Astronomers believe a salty ocean, estimated to be 40 to 100 miles deep, is hidden beneath its thick icy surface. That's a big deal in our search for life beyond Earth, since liquid water is one of the essential ingredients for all living organisms.

Juno is equipped with powerful instruments that can peer beneath Europa's ice crust, gathering data on its composition and temperature, according to NASA.

Colorized image of Europa
Colorized image of Europa's surface, taken by Galileo in 1997.  

In the close-up image above, taken by the Galileo spacecraft in 1997, you can see Europa's surface crisscrossed with cracks along its icy exterior. Previous missions spied plumes of water vapor erupting through that frozen shell. The Juno team is still processing images from Thursday's flyby, but scientists hope they captured plumes shooting from Europa's surface.

What Juno learns from the flyby could inform future missions, including NASA's Europa Clipper probe, which is set to launch in 2024 to obtain more data on the ocean beneath its icy crust and how it interacts with the surface.

"Thanks to the ingenuity of the navigation team, Juno's trajectory was adjusted to cross the Jovian moon's orbit at the right time, giving us very valuable data for the Europa Clipper mission!" Gregory Dubos, Systems engineer for the Europa Clipper mission, tweeted on Thursday.

That mission may help scientists determine whether the interior ocean exists and if the moon has the potential to be habitable for life.

COMMENTS

More Related News

NASA
NASA's Artemis I Orion spaceship enters lunar orbit - a critical step toward sending astronauts to the moon for the first time since 1972

NASA is hinging its ambitions to send astronauts to the moon and Mars - along with $50 billion spent building the spacecraft - on this mission.

NASA
NASA's Orion capsule goes into a far-out orbit around the moon, heading for record

NASA's uncrewed Orion capsule successfully executed an engine burn to enter an unusual type of orbit around the moon on the 10th day of the weeks-long...

NASA
NASA's Orion spacecraft is about to set a new record for distance from Earth

Ten days after launching from the Kennedy Space Center, NASA's Orion spacecraft on Friday entered a distant orbit around the moon, completing yet another key...

NASA
NASA's Orion capsule enters far-flung orbit around moon
  • US
  • 2022-11-25 22:38:48Z

NASA's Orion capsule entered an orbit stretching tens of thousands of miles around the moon Friday, as it neared the halfway mark of its test flight. The...

25 photos of space that could change the way you see our universe and make you feel very small
25 photos of space that could change the way you see our universe and make you feel very small

NASA telescopes and probes image planets' secret rings, black holes, cosmic dust clouds full of baby stars, and galaxies near the beginning of time.

Leave a Comment

Your email address will not be published. Required fields are marked with *

Cancel reply

Comments

Top News: Science