News

Record-breaking dwarf satellite galaxy of the Milky Way discovered

21 November 2016 Astronomy Now

An international team has found an extremely faint dwarf satellite galaxy of the Milky Way using the Hyper Suprime-Cam (HSC) on the 8.2-metre Subaru Telescope located at the Mauna Kea Observatory on Hawaii. Named Virgo I, the galaxy lies 280,000 light-years away in the constellation of Virgo. The galaxy may well be the faintest satellite galaxy yet found.

Top Stories 2015

No. 3 Dark matter is ‘sticky’

3 January 2016 Keith Cooper

For years, dark matter seemed to do nothing. It had mass and therefore could influence space gravitationally, but there was no evidence of it interacting with anything else in the Universe in any other way, which made it incredibly frustrating to study. Then, in 2015, a breakthrough occurred.

News

Dragonfly’s compound ‘eye’ reveals very faint galaxy structure

26 May 2015 Astronomy Now

At CASCA 2015, Roberto Abraham from the University of Toronto describes the first results from the Dragonfly Telephoto Array — an innovative, multi-lens system designed to produce digital images of ultra-low surface brightness objects at visible wavelengths — that is at least ten times more efficient than its nearest rival.