This Blog's History
Starting several years ago, every Friday I link back to a previous post I wrote. Why? I may be biased, but I think there's quite a bit of good, exciting science I post on this blog, and I like to revisit these old posts. Plus it is a way for new readers to see many of the cool science experiments I've done with my kids in the past without reading the blog from day one, which was over 1,000 posts ago!
What is a Planetary Nebula
A few weeks ago I wrote on the topic of a Planetary Nebula for the seventeenth post in this blog's What Is series. Eventually the Sun will becoming a Planetary Nebula, although life on Earth will be long gone by then.
Where do I go?
For the original post, click the link below. This links to the original post I wrote a couple of years ago.
What is a Planetary Nebula?
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