For this experiment you’ll need to take two measurements at least 250 km (a little more than 150 miles) due north or south of each other. You will make a couple of observations, take some measurements, use some math, and discover if the surface of the Earth is curved, and, if so, by how much. … More Is the Earth Flat?
We had a good observing session at Cline Observatory last night. I staffed one of the 8-inch Dobsonian telescopess on the pad next to the Observatory. Its been raining most of the week in the Greensboro area. The forecast for Friday night was partly cloudy with scattered storms. The sky was pretty nice by 8 … More May 26 Observing Session
Last Friday I was honored to receive the Lifetime Achievement Award from the Greensboro Astronomy Club. GAC President Stan Rosenberg surprised me with the announcement and presentation after my talk to the club. I joined the GAC in the early 1980’s, before Comet Halley. The topic of my first presentation to the GAC was how … More Support your local Astronomy Club
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
Guests on my Periscope broadcasts sometimes play a card game with me using Phlare’s “Lunar Science Cards.” I use a picture and text from each card to make-up a question about the Moon. Our first competition was on April 24, Here’s the scoreboard for that first game: Topic: Humans to the Moon (April 24) Winner … More One more game with the Lunar Cards
I am not an expert on Dark Matter or Dark Energy, I barely understand the reasons scientists think they’re out there. At the same time, I do like talking and reading about Dark Matter and Dark Energy. Today I ran into an article titled “The Dark Matter Poltergeist” by Dr. Katie Mack, and questions bubbled … More Questions about Dark Matter
OK, we didn’t turn on a burner or nuke anything, but the ingredients did change temperature in my demonstration “Cooking a Comet.” My first presentation was at Grimsley High School where we could throw the finished comet into the woods outside our classroom. The tail was beautiful as our dirty snowball completed its portion of … More “Cooking” a Comet
Recent guests on my Periscope broadcasts sometimes play a card game with me using Phlare’s “Lunar Science Cards.” I use a picture and text from each card to make-up a question about the Moon. Our first competition was on April 24, This broadcast was still available (May 1, 2017) so you can watch on Periscope. … More Scoreboard for Lunar Science Cards