The peculiar sighting is just one of several to have been reported over the Russian capital recently.
ESA's two-part ExoMars spacecraft is comprised of both the Trace Gas Orbiter and the Schiaparelli lander.
The photographs seem to show an anomalous object appearing and disappearing within a matter of seconds.
Astronomers have spotted a supermassive black hole floating in the outskirts of a newly merged galaxy.
A live feed from an eagle's nest in Michigan has recorded a mysterious figure wandering around below.
Back in the 1980's, California houseboat residents had reported hearing a strange humming noise at night.
Authorities have warned that this invasive species of hornet could decimate local bee populations.
The author of 'It' and many other popular novels maintains that creepy clowns will always be terrifying.
The privately-funded space firm founded by Amazon's Jeff Bezos has revealed two huge new rockets.
Scientists have found a way for two men to reproduce without the need for any female egg at all.
These mysterious circular, grass-ringed patches are still leaving scientists scratching their heads.
NASA's InSight Mars lander mission will now be launching in Spring 2018 following an unexpected delay.
Wildlife conservation authorities have downranked the giant panda's endangered status to 'vulnerable'.
The breathtaking spectacle saw three waterspouts appearing at the same time above a lake in China.
A huge snakeskin measuring 12ft in length has been found near Riverbank Park in the US state of Maine.
A 50,000-year-old sewing needle made from bone has been discovered during a dig at a cave in Siberia.
A Bosnian pine tree located in Greece has been identified as the oldest living tree on the continent.
Students in the US have conducted a successful test flight of a small remotely piloted glider aircraft.
Scientists have allegedly discovered a potentially habitable planet within a neighboring star system.
A series of paranormal disturbances at a house in South Lanarkshire have been investigated by the police.