Bruce Macintosh
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bmacastro.bsky.social
Bruce Macintosh
@bmacastro.bsky.social
Astronomer working on imaging extrasolar planets, instrumentation, and science policy. Spare time involves hiking with a golden retriever, and not playing enough boardgames.

Director, University of California Observatories, but opinions are my own. He/him
I would hope that trolling the chair of the Senate health commitee like this would negative consequences for Kennedy but that would require Cassidy to have a spine
November 20, 2025 at 2:59 AM
Scientists are also hard to have as players, so a science journalist like you is probably the very worst case.
November 19, 2025 at 6:01 PM
Special exception for people who work in quantum optics
November 13, 2025 at 3:24 PM
Nexus
November 8, 2025 at 5:37 AM
I won't be attend because my life/schedule is an ongoing nightmare, but I am very sorry to miss seeing you receive your award - congratulations again!
November 8, 2025 at 12:47 AM
(And as you note you'd also need to know how much nitrogen is in the home planet atmosphere; though if it's even remotely earth like it would be mostly nitrogen, and the difference between 60% N and 90% N would not be the biggest uncertainty in C14 production.)
November 6, 2025 at 8:53 PM
How old is this hypothetical alien spacecraft? Carbon 14 is good tens of thousands of years back - there are other radio-dating methods that work on longer timescales.
November 6, 2025 at 8:44 PM
It'd be somewhat hard. On Earth, carbon-14 is created by cosmic rays impacting the Earth's upper atmosphere. The cosmic ray rate could be different on another planet depending on where in the galaxy it is, strength of its magnetic field, etc, so the initial amount of C-14 could be different
November 6, 2025 at 8:44 PM
Excellent points!
November 1, 2025 at 11:40 PM
Nice!
November 1, 2025 at 9:35 PM
What can JUICE see that we can't measure from Earth?
November 1, 2025 at 7:46 PM
I want one of those hats
October 29, 2025 at 4:06 PM
October 29, 2025 at 12:24 AM
Kind of like people hunting for exoplanets in 1994.
October 24, 2025 at 9:56 PM
This is going to sound corny, but to me, @ucmerced.bsky.social 's vibe was...hopeful. Building something excellent and new for the very best of reasons, to teach the students of California.

Also the adorable bobcat is now tied with the UCSC slug for my favorite UC mascot.
October 24, 2025 at 7:50 PM