'Mountain-sized asteroid' that could wipe out Earth heading our way NEXT month ...Express.co.ukThese smaller asteroids are known to travel much nearer to Earth and could even strike out of the blue - like the 20-metre long meteor that ...Astronomy App Luminos Introduces 3D Meteor Showers and AutomationprMac (press release)Users can now locate meteor showers using the app's "Tonight's Best"