Astronomy at the Buff Lake Nature Center
A little over a mile from my front door is the Buff Lake Nature Center. On a beautiful Thursday night the kids and I attended presentation on Astronomy. Because of the high ground on which it was situated, the entire panorama of front range is visible from the center. As we watched the sun set over the mountains, the lights of Denver switched on one by one like a carpet of stars.
This can be a little strange. The center is wedged along the Sand Creek. Expensive homes are being built on one end, a water treatment plant, and a prison border the other end. Not far away is I-70 and the mainline of the Union Pacific railroad.
This did not seem to bother the nature. Buff Lake itself was peaceful under the stars. We saw a coyote, rabbits, and a herd of deer.
About astronomy we learned that stars initially burn Hydrogen for fuel. As four Hydrogen atoms combine to create Helium, a little of their collective energy is escapes as a photon of light. Initially that light is a gamma ray (or x-ray). After kicking around the sun for a million years and or so the photon loses enough energy to escape the star. It arrives here on Earth 14 minutes later partly in visible spectrum of light. Once the Hydrogen at the star's core is exhausted, it starts to burn Helium converting it into Lithium. From there it marches up the periodic table creating Beryllium, Boron, Carbon, Nitrogen, Oxygen and eventually Gold. All our atoms where once part of a star.
Depending on its size (which in turn is reflected by its color) a star can burst into a nebula, quietly turn to cosmic dust, or if it is really massive become a black hole in a moment of dreadful singularity. Black holes are easy to ignore if you don't pass the event horizon. Beyond that black holes are impossible to resist and a really big pain. Sort of reminds some of the women I am meeting!
After we discussed the physics of stars, it was roasting marchmellows around the camp fire. After we had burned half a bag or so it was dark enough to see some stars. Acturus in the constellation Bootes, Gemma in the Corona Borealism constellation. We also saw some planets: Mars, Jupiter, and Saturn and three moons of Jupiter. A very nice way to spend the evening.