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.
Part 2 of 100Space
Space from Earth to the universe: explanations of the atmosphere, orbits, planets and stars with examples and sources. Start with where space begins.
Articles
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.
Part 1 of 100