Hubble traces hidden history of the Andromeda Galaxy

  • January 18, 2025
  • 4 mins read

Jupiter’s clouds are not made of ammonia ice

  • January 18, 2025
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This image indicates the location of the newly discovered binary star D9, which is orbiting Sagittarius A*, the supermassive black hole at the centre of our galaxy. It is the first star pair ever found near a supermassive black hole. The cut-out shows the binary system as detected by the SINFONI spectrograph on ESO’s Very Large Telescope. While the two stars cannot be discerned separately in this image, the binary nature of D9 was revealed by the spectra captured by SINFONI over several years. These spectra showed that the light emitted by hydrogen gas around D9 oscillates periodically towards red and blue wavelengths as the two stars orbit each other. Credit: ESO/F. Peißker et al., S. Guisard

First ever binary star found near our galaxy’s supermassive black hole

  • January 18, 2025
  • 4 mins read

World’s darkest and clearest skies at risk from industrial megaproject

  • January 11, 2025
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