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Astrophysicist and coffee researcher; author of The Physics of Filter Coffee and The Physics of Espresso, and writer of the Coffee ad Astra blog.
5 things
Pulsar dripperHardware NextLevel
After years of development, I'm super happy to report that the dripper I dreamed of for so long is finally out!
Announcement of the no-bypass filter dripper he designed with NextLevel; the post ends with a royalties disclaimer.
2023-09-13·coffeeadastra.com ↗
Lvl-10 dripperHardware NextLevel
I was super excited when I saw the Lvl-10 dripper, because it was very close to what I wanted to achieve, and as I expected, it performed very well in terms of extraction quality.
In the Pulsar announcement he praises NextLevel's earlier dripper, from which he states he receives no benefit.
2023-09-13·coffeeadastra.com ↗
James Hoffmann's AeroPress videosOther James Hoffmann
I highly recommend watching all three of his videos, because the tests and discussions he presented are of a very high quality.
Opening of his AeroPress post, pointing readers at Hoffmann's three-part video series.
2021-09-07·coffeeadastra.com ↗
Pulsar MiniHardware NextLevel
In other words, I still use exactly the same recipe that I developed for the Pulsar when I brew with the mini, I just brew with a dose smaller by a factor 0.6 (e.g., 15 grams instead of 25).
Post on bed depth explaining how he brews with the smaller Pulsar he asked NextLevel to build.
2025-11-28·coffeeadastra.com ↗
AeroPressHardware AeroPress
While I have enjoyed the AeroPress a lot in the past especially when travelling, I have always had one big complaint about it: getting a thick coffee bed to minimize uneven flow when pressing out the water limits the brew ratios that can be used.
His standing complaint about the AeroPress, which the post's recipe is designed to work around.
2021-09-07·coffeeadastra.com ↗
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