<![CDATA[Colin Stuart's Astronomy Club: A-Z Astronomy]]>https://colinstuart.substack.com/s/a-z-astronomyhttps://substackcdn.com/image/fetch/$s_!Pk5f!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F372c8de5-c5d1-4c88-b4b3-75354ff8c6de_889x889.pngColin Stuart's Astronomy Club: A-Z Astronomyhttps://colinstuart.substack.com/s/a-z-astronomySubstackSat, 23 May 2026 05:38:44 GMT<![CDATA[A-Z Astronomy: Hubble]]>https://colinstuart.substack.com/p/a-z-astronomy-hubblehttps://colinstuart.substack.com/p/a-z-astronomy-hubbleMon, 29 Sep 2025 18:22:12 GMTImagine trying to map the universe through a grubby bathroom window. That was astronomy before the Hubble Space Telescope.

In less than 3 minutes, hear how this tin can with solar panels rewrote our cosmic story.

This is H for Hubble, part of the A–Z Astronomy series exploring the cosmos one letter at a time.

🚀 If you're enjoying the A-Z series and want to go deeper, my online astronomy course explores these big ideas in more detail. Perfect if you’re ready to learn more.

Thanks for exploring my Astronomy Club! Join for free to receive tons more space content.

]]><![CDATA[A-Z Astronomy: Gravity]]>https://colinstuart.substack.com/p/a-z-astronomy-gravityhttps://colinstuart.substack.com/p/a-z-astronomy-gravitySun, 28 Sep 2025 15:41:11 GMTIt’s the most familiar force to us, but also the one least understood by modern physics.

Explore gravity’s role in the cosmos, not just as a convener of matter, but also as a gatekeeper to the universe’s deepest secrets.

This is G for Gravity, part of the A–Z Astronomy series exploring the cosmos one letter at a time.

🚀 If you're enjoying the A-Z series and want to go deeper, my online astronomy course explores these big ideas in more detail. Perfect if you’re ready to learn more.

Thanks for exploring my Astronomy Club! Join for free to receive tons more space content.

]]><![CDATA[A-Z Astronomy: Fusion]]>https://colinstuart.substack.com/p/a-z-astronomy-fusionhttps://colinstuart.substack.com/p/a-z-astronomy-fusionSun, 17 Aug 2025 18:00:46 GMTWhat powers the stars and could the same process one day power our civilisation?

In just three minutes, discover how nuclear fusion turns hydrogen into helium, lights up the Sun, and offers the promise of a virtually limitless clean energy source.

This is F for Fusion, part of A–Z Astronomy, exploring the cosmos one letter at a time.

🚀 If you're enjoying the A-Z series and want to go deeper, my online astronomy course explores these big ideas in more detail. Perfect if you’re ready to learn more.

Thanks for exploring my Astronomy Club! Join for free to receive tons more space content.

]]><![CDATA[A-Z Astronomy: Exoplanets]]>https://colinstuart.substack.com/p/a-z-astronomy-exoplanetshttps://colinstuart.substack.com/p/a-z-astronomy-exoplanetsSat, 09 Aug 2025 13:38:10 GMTWhat kinds of worlds orbit other stars and just how strange can they get?

In just three minutes, journey to lava-scorched planets, worlds with more than one sun and places that defy our own Solar System’s rules.

This is E for Exoplanet, part of A–Z Astronomy, exploring the cosmos one letter at a time.

🚀 If you're enjoying the A-Z series and want to go deeper, my online astronomy course explores these big ideas in more detail. Perfect if you’re ready to learn more.

Image credit: ESA

Thanks for exploring my Astronomy Club! Join for free to receive tons more space content.

]]><![CDATA[A-Z Astronomy: Dark matter]]>https://colinstuart.substack.com/p/a-z-astronomy-dark-matterhttps://colinstuart.substack.com/p/a-z-astronomy-dark-matterFri, 01 Aug 2025 14:15:09 GMTWhat is dark matter? And how do we know it’s there if we can’t see it?

In this three minute audio, I explore one of the most profound mysteries in modern astronomy: what is the invisible glue that holds the universe together?

This is D for Dark Matter, part of my A–Z Astronomy mini audio series, exploring the key ideas in astronomy one letter at a time.

🚀 If you're enjoying the A-Z series and want to go deeper, my online astronomy course explores these big ideas in more detail. Perfect if you’re ready to learn more.

Image credit: ESO/L. Calçada

Thanks for exploring my Astronomy Club! Join for free to receive tons more space content.

]]><![CDATA[A-Z Astronomy: Cosmic Microwave Background]]>https://colinstuart.substack.com/p/a-z-astronomy-cosmic-microwave-backgroundhttps://colinstuart.substack.com/p/a-z-astronomy-cosmic-microwave-backgroundSun, 13 Jul 2025 16:12:45 GMTThe third entry in my A–Z mini audio series, exploring the key ideas in astronomy one letter at a time.

If you're enjoying the series and want to dive deeper, take a look at my online astronomy course. It’s purpose built to expand on the topics covered here.

Image credit: European Space Agency/Planck

]]><![CDATA[A-Z Astronomy: Black Holes]]>https://colinstuart.substack.com/p/a-z-black-holeshttps://colinstuart.substack.com/p/a-z-black-holesFri, 11 Jul 2025 20:22:41 GMTThe second entry in my A–Z mini audio series, exploring the key ideas in astronomy one letter at a time.

If you're enjoying the series and want to dive deeper, take a look at my online astronomy course. It’s purpose built to expand on the topics covered here.

Image credit: Galarza Creador (CC-BY-3.0)

Next episode

A-Z Astronomy: Cosmic Microwave Background

]]><![CDATA[A-Z Astronomy: Atoms]]>https://colinstuart.substack.com/p/a-z-atomshttps://colinstuart.substack.com/p/a-z-atomsFri, 11 Jul 2025 20:14:37 GMTThe first entry in my A–Z audio series, exploring the key ideas in astronomy one letter at a time.

If you're enjoying the series and want to dive deeper, take a look at my online astronomy course. It’s purpose built to expand on the topics covered here.

Image credit: Galarza Creador (CC-BY-3.0)

Next episode

A-Z Astronomy: Black Holes

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