Betelgeuse fainting spell is finally over?

According to a recent update from the Astronomer's Telegram (issue 13512 -, it is clear that decrease in brightness of Betelgeuse has stopped, and now it is increasing. This is based on photometry from the last two weeks or so that indicates Betelgeuse's visual magnitude has increased from it's lowest point of ~1.614 back up to ~1.575. [More]

Excel Checking List from Another List

This is similar to my last blog post where I explained how to filter a list in Excel based on another list. This time, the task is more straightforward - we just want to identify if an item in one list is present in another list. I find I use this technique quite often when using Excel (especially during data migrations). [More]