Probably the most important solar observing safety bit:
⚠️ Even if you’re in the path of totality you need to use eclipse glasses at all times the sun is visible even if it’s only the tiniest little sliver.
🚫 You can NEVER look at the sun without eclipse glasses.
👁️ Only during totality, and totality only (e.g. not at 99.9%) you can look without glasses because the Moon literally completely hides the sun so you’re only looking at the Moon then.
