23 October 2025
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  • [ 21 October 2025 ] Europe’s planet hunting spacecraft complete and ready for final testing News
  • [ 24 September 2025 ] Nova outburst in Centaurus News
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Video: Pluto scientist’s biggest surprise so far

13 July 2015 Astronomy Now

Alan Stern, principal investigator for the New Horizon mission, reveals his biggest surprise so far as the probe closes in on Pluto. (Recorded 12 July 2015.)

  • Alan Stern
  • flyby
  • New Horizons
  • Pluto

Related Articles

News

How big is Pluto? New Horizons settles decades-long debate

13 July 2015 Astronomy Now

The true size of Pluto has been debated since its discovery over 85 years ago. New Horizons’ mission scientists can now answer that question with certainty, confirming that Pluto is larger than all other known Solar System objects beyond the orbit of Neptune.

Picture This

Kerberos completes family portrait of Pluto’s moons

25 October 2015 Astronomy Now

Images just sent back to Earth this week of Pluto’s tiny moon tiny Kerberos taken by NASA’s New Horizons spacecraft complete the family portrait of Pluto’s moons. Kerberos has a double-lobed shape suggesting that it could have been formed by the merger of two smaller objects. It also appears to be smaller than scientists expected and has a highly-reflective surface, counter to predictions prior to the Pluto flyby in July.

News

Ground team ready to rouse Pluto probe for historic flyby

1 December 2014 Stephen Clark

On the final stretch of a speedy nine-year trek through the solar system, NASA’s New Horizons spacecraft will be awakened from hibernation Dec. 6 for an encounter with Pluto, a mysterious world that has captured imaginations and will soon be revealed in reality.

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News Headlines

  • Europe’s planet hunting spacecraft complete and ready for final testing
    21 October 2025
  • Nova outburst in Centaurus
    24 September 2025
  • Astronomy Now relaunches digital platform
    12 September 2025
  • Potentially habitable planet TRAPPIST-1e displays tentative evidence for an atmosphere
    8 September 2025
  • Ten-Year Lease Extension Confirmed at Herstmonceux Observatory
    18 August 2025
  • Home
  • The Magazine
    • About
    • Current Issue
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      • September last issue
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  • AstroFest 2026
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    • DSLR Calc
  • Reviews
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    • Book Reviews
  • Spaceflight Now
  • Shop
  • Contact Us
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    • Ask Astronomy Now
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    • AstroListings

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