In this video I show you how much vacuum there is in a fluorescent tube light bulb. I talk about how they work and why they need a low vacuum.

Northern Lights Tonight: For millions of sky-gazers across the United States, tonight isn't just another night. The promise of the Northern Lights tonight, the dazzling aurora borealis, is set to ...

Northern Lights Tonight (November 12, 2025): Skywatchers across the US are on high alert. The National Oceanic and Atmospheric Administration (NOAA) has confirmed that one of the strongest space ...