In the last episode, we looked at how stars end up dead. So Chris has an important follow-up: can you find a way to heal and save a dying star?

#InvisibleRainbows

Our Sun and many other stars will become larger later in life. But is this a condition common to all stars? Guest questioner Francis wonders about the future of stars and their ultimate demise!

In this episode, we tackle the peculiar carbonado diamond, a black diamond that looks very different from the glittering gems we might be more familiar with. And we will discover that its origin might be out of this world!

Carbonado Diamond going on auction

Invisible Rainbows

Planets in sci-fi are often portrayed as having a single climate, but how truthful is that idea? This audience question gets the full treatment from Alfredo & Chris as they deal with the tatooines, hoths, risas, synnaxes of the real universe!

The Astroholic Explains Xmas Special is inspired by Italo Calvino's Cosmicomics on the 100th anniversary of the author's birth. Join us for an imaginative tale, not fantasy nor sci-fi, but one based on science facts: the formation of elements in stars and how they spread across the universe. ✨

And if you are interested in my book, here is a link to the crowdfunding.

I'm writing a book all about the astronomy we do with the light we cannot see with our own eyes. It's called Invisible Rainbows and features astronomers from all around the world.

If you are interested in finding out more and maybe pledge for a copy, click on this link.

In this episode, Alfredo and Chris are joined by cosmologist Professor Peter Coles. Together they explore the limits of the visible universe, whether finite or infinite, why there is no center, and what might be beyond the most distant region we can see.

We don't know and will likely never know what happened before the Big Bang, but Chris is curious about it, so we take a journey in the land before time and space!

Conspiracy theories and misconceptions about the Moon extend far beyond the Moon-landing! In this episode, we take a trip 4.5 billion years into the past to witness how Luna came to be.