Did a lost star knock the Earth off its orbit? New theory to explain why our planet circles the sun at an angle to the solar equator

Did a lost star knock the Earth off its orbit? New theory to explain why our planet circles the sun at an angle to the solar equator | Mail Online: "It has been a long standing puzzle to astronomers: why is the Earth's orbit tipped 7 degrees relative to the sun's equator? Now a new theory suggests that violent stage of our solar system's history, an errant young star strayed close and pulled our developing planets out of whack with the sun's equator."