At first blush, it looks like the moon.

But a closer inspection shows the strange light flashing and flickering.

So, what is it? 

Are we being watched by aliens?

Probably not.

Several social media posts started popping up on Thursday night, all showing the same flickering orb in the eastern sky.

A quick call to Durham Regioinal Police suggested it may be a flare by the search and rescue team at CFB Trenton.

They were in the area, searching for a missing boater on Lake Ontario, at the time the strange lights appeared.

A spokesperson for CFB Trenton says they were using parachute flares, which burn so bright, they can easily be seen from across the city.