CavinSmith

Here is also a very interesting article https://www.nasa.gov/feature/goddard/2018/mystery-of-purple-lights-in-sky-solved-with-help-from-citizen-scientists The starry sky has always fascinated me, so now my hobby is to study astronomy in my spare time. ________________________________________________________________________________________________________ I will help prepare for the examinations in biology and chemistry, in addition, write your thesis or other papers.