Astrum
A solo-hosted documentary series exploring the latest discoveries and enduring mysteries of astronomy and space exploration.
This is a solo-hosted, documentary-style YouTube show that breaks down complex topics in astrophysics and planetary science. Using a clear, authoritative voice-over, host Alex McColgan explains concepts from the formation of lunar craters to alternative theories about black holes. Episodes are built around a central scientific question and are heavily reliant on polished animations, data visualizations, and simulations to tell the story.
“The show's strength is its ability to translate dense, cutting-edge scientific papers and theories into compelling, visually-rich narratives. Unlike many science channels, it often focuses on a single, deep topic per episode, such as a specific celestial object or a new research paper, giving viewers a thorough understanding.”
Who hosts this show
Astrum is a UK-based YouTube channel that explains complex topics in astronomy, astrophysics, and planetary science. Hosted by Alex McColgan, the show uses high-quality animations, clear narration, and simulations to make cutting-edge science accessible to a general audience. McColgan started the channel in 2013 while at university and has since grown it to include a team of writers and editors.
Credentials & credits
- Creator of Astrum YouTube channel since 2013
- BA in Digital Film and TV, University Centre Grimsby
- Director, MCCOLGAN ASTRUM SPACE LIMITED
Other ventures
- Astrum Podcast
- Astrum Earth (YouTube channel)
- Astrum Spanish (YouTube channel)
- Astrum Portuguese (YouTube channel)
- Patreon Membership
What kind of podcast
- Country
- United Kingdom
- Region
- uk
When new episodes drop
- 01This Moon Collision Did Something Crazy on EarthJun 24, 2026 · 19 min
- 02Sagittarius A* Might Not Be a Black HoleJun 17, 2026 · 26 min
- 03Something Came Out of 3I/ATLASJun 10, 2026 · 26 min
- 04This Isn’t Sci-Fi. It’s the Future of Space TravelJun 3, 2026 · 27 min
- 05Artemis 2's Deadly Discovery on the MoonMay 27, 2026 · 27 min
- 06The 500-Million-Year-Old Evidence That Earth Had RingsMay 21, 2026 · 25 min
- 07NASA Found Evidence of Water All Over Mars, and It's a Big DealMay 18, 2026 · 32 min
- 08JWST Spotted Mysterious Red Dots at the Edge of the UniverseMay 13, 2026 · 32 min
Notable episodes
- 01Sagittarius A* Might Not Be a Black Hole
Explores a radical new theory that challenges a core concept in astrophysics, demonstrating the show's ability to tackle cutting-edge, complex science.
- 02This Moon Collision Did Something Crazy on Earth
Connects a remote lunar event directly to Earth's history, including the age of dinosaurs, making a distant topic feel immediate and impactful.
- 03Something Came Out of 3I/ATLAS
Provides a comprehensive summary of a major, collaborative scientific observation campaign, showcasing the show's role as a detailed science communicator.
What you'll be asked on this show
Astrum is a solo narrative show with no interviews. Host Alex McColgan uses a voice-over to guide the viewer through a scientific topic, often structuring the episode around a central mystery. The visual style is polished and professional, with frequent use of high-quality simulations and animations to illustrate complex ideas. Some episodes are "supercuts" that compile and update previous content on a single theme, like the search for water on Mars.
Signature segments
- · Host introduction: "I'm Alex McColgan and you're watching Astrum."
- · Patreon supporter credits displayed on rockets in the end screen.
- · "Supercut" episodes compiling previous content on a single topic.
- · Occasional "at home" meme format (e.g., "We have Tycho Crater at home.")
Topics covered repeatedly
Who gets booked here
The show does not feature guest interviews. It frequently cites the work of scientists, researchers, and historical figures, often showing their names and affiliations on screen, but they do not appear for interviews.
Where to find this show
Audience & reach
Sponsors are often tech-focused (Dwarf Lab telescopes, JMP statistical software) or direct-to-consumer brands that appeal to a scientifically curious audience (Babbel, VisiSolar eclipse glasses). Sponsorships are integrated as host-read segments within the video, often with a discount code for viewers.
Subscriber and view counts are pulled live from YouTube and re-verified on a 30-day cycle. Listener estimates for the RSS feed aren't published here unless they're host-verified.
Pitch this show
People also ask
- What is the host's name?
- The creator and host of Astrum is Alex McColgan.
- Is Astrum still making new videos?
- Yes, the channel is active and typically releases new videos on a weekly basis.
- What is the format of the show?
- Astrum is a solo-hosted, narrative documentary-style show. It does not feature interviews.
- Where can I watch Astrum?
- The primary platform for Astrum is its YouTube channel. Audio versions are also available as a podcast on platforms like Apple Podcasts and Spotify.
- Does the show have guests?
- No, Astrum is a solo narrative format and does not conduct interviews. It does, however, frequently reference the work of various scientists and researchers.
Built from the show's public RSS feed, YouTube, the host's own websites, and the cited sources below. Computed and AI-extracted fields are labelled. Facts only — no private info, no fabrication, no transcripts republished.
Sources & how this page was built
This page is AI-assisted, grounded in the public sources cited below, and host-verifiable. We publish facts only; we do not republish transcripts. If anything here is wrong, the host can claim and correct the page above.Model: gemini-2.5-pro · high confidence
- [01]Astrum YouTube Channelyoutube.com
- [02]MCCOLGAN ASTRUM SPACE LIMITED - Companies Housefind-and-update.company-information.service.gov.uk
- [03]Astrum Space - Apple Podcastspodcasts.apple.com
- [04]Astrum Pivots to Memberships After a Decade on YouTube - The Publish Pressthepublishpress.com
- [05]Alex McColgan Work Blog - CV and Referencealexmccolganworkblog.blogspot.com
- [06]Astrum Patreonpatreon.com
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