Galaxies NGC 5394 and NGC 5395, around 160 million light-years from Earth, are caught in a slow motion collision.
Interstellar comet 2I/Borisov is heading out of the Solar System at a speed of 175,000 km per hour.
Dr Stella Kafka, executive director of the AAVSO, will headline Australia’s major amateur astronomy conference in April.
The 150-year-old Great Melbourne Telescope is a step closer to full restoration, thanks to the efforts of volunteers.
Following the brightest gamma ray burst ever detected, ground- and space-based telescopes immediately swung into action.
The Hubble Space Telescope has imaged Comet 2I/Borisov, believed to have originated in a planetary system far beyond our own.