#535 - 12 Months of Messier May

The Actual Astronomy Podcast25mMay 18, 2026

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AI-Generated Summary

This episode of The Actual Astronomy Podcast dives into the May edition of the 12 Months of Messier series, spotlighting a curated selection of deep-sky objects visible in the spring night sky. Hosts Chris and Shane emphasize that while the Messier list is traditionally associated with amateur astronomy, this monthly breakdown—curated by SEDS—makes the challenge more accessible by grouping objects by seasonal visibility. The conversation centers on galaxies like M51 (the Whirlpool), M63 (the Sunflower), and M104 (the Sombrero), with a focus on how aperture size and sky darkness dramatically affect visibility. A standout revelation: even city observers with modest gear can catch key objects like M64 (the Black Eye) and M49 due to their brightness and high contrast. The hosts reflect on personal observing experiences, including a memorable night under dark skies where spiral arms in M51 became vividly apparent through a 12-inch telescope. They also highlight the importance of revisiting classic objects not just for novelty, but for deepening observational skills and appreciating the subtle beauty of galaxies that only reveal themselves under optimal conditions. The episode underscores a shift in perspective: galaxy hunting isn't just about faint smudges, but about mastering contrast, aperture, and patience. Chris shares a pivotal realization—that his refractor setup has sidelined galaxy observing, prompting a renewed commitment to include them in future sessions.

Key Takeaways
1

M64 (Black Eye Galaxy) is one of the most high-contrast Messier objects and may be visible in a 4-inch telescope from light-polluted areas.

2

M104 (Sombrero Galaxy) requires dark skies and larger apertures to reveal its dark dust lane and three-dimensional structure.

3

Even with modest equipment, bright Messier galaxies like M49 and M63 are accessible from cities due to their magnitude (8.4–9.9).

4

Aperture size dramatically impacts detail visibility—Chris observed spiral arms in M61 only through a 7-inch telescope, not a 4-inch.

5

Revisiting classic galaxies like M51 and M101 helps refine observational skills and deepen appreciation for deep-sky beauty.

…and 3 more takeaways available in PodZeus

Chapters
0:00
3 min

Introduction to May's Messier Tour

Chris and Shane kick off the May edition of the 12 Months of Messier series, reflecting on their progress halfway through the year and introducing the SEDS-curated monthly guide to Messier objects.

2:30
5 min

M51: The Whirlpool Galaxy and Its Legacy

I had my 12 inch out... the spiral arms were just so apparent, like the most apparent I've ever seen them and just beautiful views.

Highlight
7:30
6 min

M63, M94, and the Transition to Fainter Galaxies

The conversation shifts to M63 and M94, with Shane admitting he hasn’t prioritized galaxy observing since switching to refractors, prompting a renewed commitment to deep-sky targets.

13:20
6 min

M101 and M102: Large but Faint, and a Controversial Entry

Chris and Shane discuss M101’s large angular size and faintness, noting its similarity to M33, while debating the legitimacy of M102 as a true Messier object.

19:10
6 min

M64, M85, M49, M61, and M104: Contrast, Aperture, and Urban Observing

With your four inch Takahashi, I almost think you might be able to see this detail from the city. Really?

Highlight
High-Impact Quotes
With your four inch Takahashi, I almost think you might be able to see this detail from the city. Really?
Chris15:59
Viral: 88.0
been a couple of others, but the spiral arms were just so apparent, like the most apparent I've ever seen them and just beautiful views.
Chris5:19
Viral: 85.0
You can pick it up, but it's not that faint. M104 is one of the brighter Messier galaxies at magnitude 8.
Chris21:33
Viral: 72.0
Speakers

Host

Chris

Guest

Shane
Topics Discussed
messier galaxies95%deep sky observing90%aperture and visibility88%urban astronomy85%galaxy observing tips80%messier list by month75%dark sky observing70%amateur astronomy65%
People & Brands

chris

person

12xNeutral

shane

person

11xNeutral

m51

other

10xPositive

m64

other

8xPositive

m104

other

7xPositive

canis venatici

other

6xNeutral

m49

other

5xNeutral

coma berenice

other

4xNeutral

m61

other

4xPositive

m101

other

4xNeutral

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