A mysterious circle of light over Houston has led some people to explore the theory of a UFO circling the skies - and even spying on NASA. From Season 3 Episode 7. 🇬🇧 Catch full episodes of your favourite Quest shows on discovery+: https://bit.ly/3yWZURY Subscribe to Quest TV for more ...

While searching the cosmos for exoplanets, the Kepler space telescope discovers a peculiar star, whose light is behaving in a way never seen before. From Season 3 Episode 1 🇬🇧 Catch full episodes of your favourite Quest shows on discovery+: Subscribe to Quest TV for more great clips: ...