Scaling the Solar System Purpose: To understand the sizes and distances of solar system objects by making a scale model of the solar system based on the Sun as an eight-inch bowling ball. Make a couple of Predictions: If an 8” bowling ball represents the size of the Sun, what common object would represent the … More Scaling the Solar System
Sometimes folks use the word “weight” instead of mass, but I know what you mean. Having spent my whole life on Earth, I’ve come to the point of equating the two in casual conversation. So astronomers tend to talk about “mass” as one aspect of a celestial object; planet, moon or star. So what’s the … More What’s the mass of that planet?
Main Sequence, Red Giant, White Dwarf In very broad terms, those are stages our Sun will evolve through as it ages and dies. The end won’t commence for 4 or 5 billion years, so we don’t need to panic. When I began teaching astronomy at Grimsley High School, one activity that was always a … More Our Changing Sun (part 1)
We had a wonderful public viewing session at GTCC’s Cline Observatory last night (Friday, July 31.) The event was dedicated to Jo Cline, a great friend of astronomy who passed away last week. We began observing with a view of Saturn in the still-dusky sky. Some of the guests could see a moon or two, … More Great Observing at Cline Observatory
Tomorrow (July 31, 2015) we will have a really bright full moon, not like the waxing crescent shown in my image here. I am scheduled to host at the pubic observing session at GTCC’s Cline Observatory tomorrow, and the session is open to the public free of charge. Cline Observatory was built and opened in … More “When the Moon Hits Your Eye…”