Daily Archives: April 21, 2019

The Northern Lights

Posted on April 21, 2019 by richardtli

One of the world’s most fascinating and natural wonders are the Northern Lights. These magical lights come in a variety of dancing colors. This seemingly random light show occurs as a result of interactions of Earth’s magnetic field and atmosphere with solar winds. Solar winds released by the Sun’s sunspot regions travel through space until … Continue reading The Northern Lights → Continue reading →

Posted in Light, Physics, Sun | Tagged , , , | Comments Off on The Northern Lights

How Hard is Interstellar Travel?

Posted on April 21, 2019 by richardtli

Traveling to other solar systems seem pretty easy in the movies, but in real life, it could get quite complicated. First of all, the closest star system to us is Alpha Centauri, which is 4.37 light-years away, which is very far from us even if we can travel at the speed of light. But even … Continue reading How Hard is Interstellar Travel? → Continue reading →

Posted in Physics | Tagged , , , | Comments Off on How Hard is Interstellar Travel?