age – Astronomy Now

4 June 2023

Latest News

[ 1 June 2023 ] Webb spots vast plume of water vapor spewing from Saturn’s moon Enceladus News
[ 26 May 2023 ] Seeing the universe in X-rays, optical and infrared, all at once News
[ 15 May 2023 ] A record-setting explosion as a supermassive black hole gorges on gas News
[ 13 May 2023 ] Globular cluster mystery may be explained by short-lived ultra-massive suns News
[ 12 May 2023 ] Jammed radar boom on Jupiter-bound Juice probe finally freed News

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.