4 July 2022
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  • [ 9 June 2022 ] Micrometeoroid dings James Webb mirror segment News
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  • [ 9 May 2022 ] Webb optical alignment complete and virtually perfect News
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  • [ 14 April 2022 ] The largest comet ever seen has been measured – and it’s a whopper News
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Picture This

The mesmerizing outskirts of NGC 4603 – a key galaxy in Hubble’s ‘key project’

30 August 2021 Astronomy Now

The spiral arms of galaxy NGC 4603 are home to multiple Cepheid variable stars, “standard candles” that helped astronomers pin down the age of the universe in one of the Hubble Space Telescope’s first major projects.

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News Headlines

  • Micrometeoroid dings James Webb mirror segment

    9 June 2022
  • Milky Way’s supermassive black hole shines in stunning first portrait

    12 May 2022
  • Webb optical alignment complete and virtually perfect

    9 May 2022
  • Ingenuity zooms over Mars rover’s discarded parachute and backshell

    2 May 2022
  • The largest comet ever seen has been measured – and it’s a whopper

    14 April 2022
  • Home
  • The Magazine
    • About
    • Current Issue
    • Subscribe
    • Renew Subscription
      • August last issue
      • July last issue
      • June last issue
  • AstroFest
  • 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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