For students in PHYS1111 Introduction to Astronomy in Northeastern University’s Hayden Hall, learning about the vastness of the universe was mind-boggling enough.
The class’ instructor, Stefan Kautsch, asked them to consider the distance of the closest star system — Alpha Centauri — to the Earth’s solar system. How do you begin to make sense of 4.37 light-years, with each light-year measuring about 6 trillion miles?
Then Kautsch, a teaching professor and physicist, posed another thought-provoking question: How likely is it that aliens from other star systems in our universe, even other galaxies, have visited the Earth?
Read more at Northeastern Global News
