RT @Astroguyz: 3-9 metres would be a decent bolide, yeah. Chelyabinsk was estimated to be ~20 metres in size. twitter.com/_TheGeoff/stat…
RT @Astroguyz: 3-9 metres would be a decent bolide, yeah. Chelyabinsk was estimated to be ~20 metres in size. twitter.com/_TheGeoff/stat…