An asteroid is expected to pass between the Earth and the moon this evening.
Although it will not hit Earth, it could hit one of its surrounding satellites.
Space journalist and Astrophysicist Sarah Cruddas told Daybreak that scientists knew very little about asteroids.
She said studying them can help provide a better understanding as to why we came to be here on the Earth.
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Ex-Spitfire pilot Allan Scott, 94, said he was told off by the Queen when he first met her in 1943 when she was just 16.
Last minute preparations are going on at the Church of St Mary Magdalene where Princess Charlotte will be christened.
Princess Charlotte is being christened on Sunday at Sandringham in Norfolk in only her second public appearance since she was born.