Colliding Galaxies at Your Fingertips

When we look at a few Hubble photos of distant galaxies we may get the impression the universe is a static place. Other than the occasional supernova brightening, the galaxies we see haven’t changed much over the hundred years of observational history. But, it may well be the dynamics of energetic galactic collisions that created […]

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Keithley 196 System DMM

I’ve had this Keithley 196 6 1/2 digit multimeter for about 25 years and it works as great today as it did when I first got it. I usually use it on the voltage scale or the Ohms scale. On the 30 v scale, the least digit is 10 uV. When pushed to the limit, […]

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