Last night a 900 foot wide asteroid made the latest in a series of close approaches towards Earth.
There is a chance it could collide with the Earth in 2036, the biggest threat would be if it fell on land mass.
Speaking to ITV Daybreak, Dr Maggie Aderin-Pocock said if it hits a city it would cause devastation.
More top news
The parents of a missing 15-year-old girl have asked their daughter to come home in a statement released alongside Avon and Somerset Police.
For an 11 year old Syrian boy named Saleh, courage comes in learning to ride his new bike again.
A misty and cloudy night should keep frost away for most of the UK, with some spells of rain overnight.