oxygen

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Weekend Diversion: A Green Fire

“Build a man a fire, and he’ll be warm for a day. Set a man on fire, and he’ll be warm for the rest of his life.” -Terry Pratchett Whether it comes from without or within, there are few things in this life that captivate our attention better than a brilliant, hot and colorful display.…

“Building one space station for everyone was and is insane: we should have built a dozen.” -Larry Niven Here on the solid ground of the Earth, the Sun and Moon rise and set on a daily basis. During the hours where the Sun is invisible, blocked by the solid Earth, the stars twirl overhead in…

Do all Stars Eventually Explode?

What’s going to happen to all the stars in the Universe as they get older? Well, just as nothing can live forever, stars can’t live forever also. Why? Because they run on fuel: burning hydrogen into helium, for example. When they run out of fuel, something’s gotta give. Barbara Ryden reminds us of an excellent…