Thursday, August 21, 2025

Space & Physics: Can the Juno mission to Jupiter be saved?

August 21 — This week, scientists seek to extend an epic NASA mission to Jupiter, engineers design flying disks to explore Earth's "ignorosphere," astronomers discover a new moon twirling around Uranus, and more. Enjoy!

Lee Billings, Senior Editor, Space and Physics


The Juno spacecraft has rewritten the story on Jupiter, the solar system's undisputed heavyweight

Juno—NASA's current mission to Jupiter—is running out of time.

Launched in 2011 and arriving to its destination 5 years later (on the 4th of July, no less), this U.S. spacecraft has spent nearly a decade lifting the veil on our solar system's biggest planet. Now, however, its mission may be at an end, with an official expiration set for next month.

Juno's Jovian sojourn has taken it repeatedly swooping through Jupiter's intense, electronics-frying radiation belts—but the spacecraft is still in remarkably good health, fully functional and ready for more science. No other mission is presently at the giant planet; two—NASA's Clipper and the ESA's JUICE—are inbound albeit still years away.

Juno's team is hoping NASA will give their mission a reprieve, but the prospects appear gloomy given ongoing uncertainties as the White House, Congress, federal agencies and external stakeholders all squabble over federal budget numbers. Can Juno be saved?

Read our top story (linked at the top of this note) to find out more—and to savor the stunning science and beautiful imagery our latest, greatest emissary to Jupiter has beamed back home.

Thoughts? Questions? Let me know via e-mail (lbillings@sciam.com), Twitter or Bluesky.

Thanks for reading, and I'll see you next time.

Lee Billings

Top Stories
NASA's James Webb Space Telescope Discovers New Moon of Uranus

Using the powerful James Webb Space Telescope, scientists have spotted a moon nestled near Uranus's rings that's so small you could walk around it

These Tiny Disks Will Sail on Sunlight into Earth's Mysterious 'Ignorosphere'

With no fuel or engines, tiny explorers will surf sun-warmed air alone to explore high in the skies of Earth and Mars

The Universe Is Static. No, Expanding! Wait, Slowing? Oh, Accelerating

The universe has a habit of disproving "unassailable" facts

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The Search for Extraterrestrial Life Is a Roller Coaster of Hope and Disappointment

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One Year after Scientific American's First Issue, the Solar System Grew by a Planet

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Can Cosmic Rays Help Alien Life Thrive?

Beneath the surfaces of distant planets, microbes might subsist on harsh radiation rather than starlight, a new study suggests

Math Breakthroughs from Behind Bars

People in prisons and jails have contributed to some of the greatest ideas in mathematics

What We're Reading
  • Onionlike space explosion may be a new type of supernova | New York Times
  • There might be a 'Planet Y' hiding in the outer solar system | New Scientist
  • NASA's acting chief calls for the end of Earth science at the space agency | Ars Technica

From the Archive
Jupiter's Great Red Spot Is Surprisingly Deep

NASA's Juno spacecraft peered underneath the gas giant's dense clouds to determine the structure of its iconic spinning storm

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