Spacetime With Stuart Gary

The astronomy and space science news podcast.Stream podcast episodes on demand from www.bitesz.com/spacetime (mobile friendly).   *Hunting for dark GalaxiesAn ancient collision with a newly discovered dark dwarf galaxy may be responsible for the Milky Way’s characteristic outer disk ripples. *Massive Martian ice discovery opens a window into red planet's historyScientists say newly discovered layers of ice buried almost two kilometres beneath the Martian north pole are the remnants of ancient polar ice sheets -- and could be one of the largest water reservoirs on the planet. *Earth's mantle is far more intricate than thoughtA new study has revealed the Earth’s mantle to be a far more geochemically diverse mosaic than previously thought. *The ticking time bomb of BetelgeuseBetelgeuse is a massive ticking time bomb – destined to explode as one of the nearest supernovae to Earth – and it could happen any time now. *Russia launches new military navigation satelliteRussian space forces have launched a new military