You can watch live images from the Bayfordbury AllSky Camera here. Hover over the image for information on what you're seeing.
More top news
A man has been rescued by firefighters - after getting his head stuck inside a washing machine.
Late-running passengers who attempt to pass through security with less than 30 minutes before their flight departs will now be stopped.
A Ukrainian pilot who spent two years in prison in Russia has been sworn into national parliament after being released last week.