2 October 2023
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  • [ 11 September 2023 ] The Great Square of Pegasus: heralding autumn News
  • [ 18 August 2023 ] New comet predicted to brighten rapidly as it sprints Sunwards News
  • [ 2 August 2023 ] NASA picks up faint carrier signal from Voyager 2 News
  • [ 31 July 2023 ] Razor-sharp test images show Euclid’s instruments performing as expected News
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University of Cologne

News

Hubble views of Ganymede’s aurorae suggest a vast salty subsurface ocean

13 March 2015 Astronomy Now

Jupiter’s moon Ganymede is the largest moon in our Solar System and the only moon with its own magnetic field. NASA’s Hubble Space Telescope has the best evidence yet for a 60-mile deep underground saline ocean on Ganymede, believed to contain more water than all the water on Earth’s surface.

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News Headlines

  • The Great Square of Pegasus: heralding autumn
    11 September 2023
  • New comet predicted to brighten rapidly as it sprints Sunwards
    18 August 2023
  • NASA picks up faint carrier signal from Voyager 2
    2 August 2023
  • Razor-sharp test images show Euclid’s instruments performing as expected
    31 July 2023
  • NASA loses touch with Voyager 2; waits for craft to ‘phone home’
    31 July 2023
  • Home
  • The Magazine
    • About
    • Current Issue
    • Subscribe
    • Renew Subscription
      • September last issue
      • October last issue
      • November last issue
  • AstroFest 2023
  • News
  • Observing
    • UK Sky Chart
    • Almanac
    • Scope Calc
    • DSLR Calc
  • Reviews
    • Equipment
    • Book Reviews
  • Spaceflight Now
  • Shop
  • Contact Us
    • Subscriptions
    • Your Views
    • Ask Astronomy Now
    • Editorial
    • Advertising

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