May 3rd, 2016
Waning Crescent Moon
Seth Jarvis

Cosmic Quiz: Why can’t light escape a Black Hole?

This week’s Cosmic Quiz question comes from James Sylvester, who asks, “If the speed of light is the highest attainable speed, why can’t it escape a black hole?” First, a few words about the speed of light, which is indeed…

Seth Jarvis

Cosmic Quiz – Why is the moon sometimes visible during the day?

This week 6-year-old Kambreigh Schooley asked us why she can sometimes see the moon during the daytime…What a great question! To answer this question you need to first remember that one half of the moon is always illuminated by the…