Why is the sky blue by day and black at night?
How air redirects sunlight towards our eyes, why sunsets turn red, and why the darkness between stars needs a separate explanation.
Tag archive
#space
Articles: 2
What is space, and where does it begin?
From passenger aircraft to Starlink: the conventional boundary of space, why the atmosphere does not end at 100 km, and how a Blue Origin flight differs from a SpaceX flight.