John Forbes
redshiftless.bsky.social
John Forbes
@redshiftless.bsky.social
Astronomer in Aotearoa/New Zealand at the University of Canterbury.

Pusher of pixels, pens, arrays, and computer keys.

www.johncforbes.com
I think the "abundance agenda" is vague enough that some people could read it that way, but my read is that we need to build a lot of solar/batteries/transmission (to keep fossil fuels in the ground!), and a lot of old-school environmentalists are opposed to that because it involves building stuff.
November 6, 2025 at 11:21 AM
Re the CRs: the age might buy you a factor of 2 relative to the solar system, but there may be a larger effect (in the same direction!) - 3I's orbit sends it further above the galactic midplane -> less B field -> more CRs

(adapted from an argument made in this paper: arxiv.org/abs/2509.04165).
September 9, 2025 at 11:55 PM
It is wild how many outdoor cats there are in NZ. Everyone loves the native birds, but the outdoor cat culture is really ingrained.
August 26, 2025 at 8:30 AM
Obviously peer reviewed vs. not can be an issue, but in this particular case the data in the paper seems to have been completely fabricated. I think it's fair to say that peer review generally operates on assumptions of good faith, so fake data will often make it through.
August 17, 2025 at 8:25 AM
They don't seem to sell many ads on these calculator-style searches, so perhaps costing google money is the most ethical choice 🤷 (if it worked lol).

But seriously, not a bad point!
August 4, 2025 at 5:57 AM
Yeah, could be. Google has worked well for the past decade, so it feels like the end of an era.
August 4, 2025 at 4:12 AM
If this holds up it will be the 3rd interstellar object (comet or asteroid from another star system). Not every day we get to increase the sample by 50%!

168 hr arc = observed over a period of 1 week so far, and e~9 meaning convincingly interstellar (anything >~1 is not bound to the Sun).
July 2, 2025 at 4:19 AM
Bad stats (and not a convincing biosignature in the first place) bsky.app/profile/dist...
𝗡𝗼, 𝗮 𝗯𝗶𝗼𝘀𝗶𝗴𝗻𝗮𝘁𝘂𝗿𝗲 𝘄𝗮𝘀 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝗱𝗲𝘁𝗲𝗰𝘁𝗲𝗱 𝗶𝗻 𝗞𝟮-𝟭𝟴𝗯'𝘀 𝗮𝘁𝗺𝗼𝘀𝗽𝗵𝗲𝗿𝗲.

K2-18b is back in the news, now with a bold claim that biosignature molecules (DMS and/or DMDS) have been 'detected at 3σ'.

Most exoplanet astronomers are extremely sceptical about these claims, let's see why (1/n).

🔭🧪🪐 #exoplanet
April 18, 2025 at 3:13 AM