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Good

good

Excellent

This is great..I have learned alot from this course....

دورة رائعة

It has been very useful for me

I Like universe and stars, Milky way and others galaxies, I Studied solar physic on our system, i think andromedia and our galaxy we be collusion en 3 billions years, the both will form one big galaxy. Actually andromedia is 2.5 Millions km of distance

One of my favorite topics

COURS TRES TRES BIEN EXPLIQUE MERCI A MONSIEUR LE FORMATEUR