An enormous celestial gas cloud that first left the Milky Way when dinosaurs roamed the Earth is speeding back towards the galaxy at roughly 700,000 miles per hour, a study in The Astrophysical Journal Letter Reports.
The cloud – known as “The Smith Cloud” – was first ejected from the Galaxy some 70 million years ago. It is full of sulfur, over 11,000 light years long, nearly 2,500 light years wide, and has the mass of roughly one million suns. It is shaped like a comet and contains no stars, making it invisible in optical wavelengths.
Published by Science Recorder. See more at: https://www.sciencerecorder.com/news/2016/01/29/gigantic-gas-cloud-set-collide-milky-way/