The Celestia Paper You must write a ten page paper describing your solar system. This paper is due to be uploaded to OneNote by the end time of our scheduled exam. That is Friday, January 14 at 15:30 E.S.T. ! Grading Rubric for the Written Report No paper will be accepted after 5 pm on the date of the exam! The paper is worth 50 points and is 20% of your semester grade.