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@demonplanet.bsky.social

L. Drake Deming. Decades of exoplanets: Ground, Hubble, Spitzer, JWST. Radiative transfer. RV of the Sun-as-a-star.

41 Followers  |  122 Following  |  79 Posts  |  Joined: 12.11.2024  |  2.1059

Latest posts by demonplanet.bsky.social on Bluesky

John Carter was here.

28.11.2025 13:06 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I have to admit that I'm not pissed off at Avi Loeb. I just ignore that stuff, I have my hands full with real work.

22.11.2025 00:28 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

They might mean GISS, not GSFC per se. But still bad for GSFC.

01.11.2025 01:25 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

It's my understanding that Venezuela has the world's largest proven oil reserves. Look it up - wikipedia.

01.11.2025 01:00 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 3    πŸ“Œ 0

Was the central pressure of Camille measured?

28.10.2025 14:12 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Ah, I see the difference. Google AI gave me the wrong number for the TNT, but then several lines later it quoted the correct number, without even commenting on the contradiction. I should remember that AI has to be checked carefully. (so, what good is it?)

27.10.2025 23:28 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

If you're referring to mc^2, then your math is off. An ounce is 28 grams, and mc^2 = 2.5e22 ergs = 60, 000, 000, 000 tons of TNT.

27.10.2025 22:43 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

According to Google AI, the total active-duty military payroll is $200 billion per year. 130 million will pay for about 6 hours of military payroll, if I did the math correctly.

24.10.2025 19:17 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I'm certain that the number submitted is over 2900, and good chance that it hits 3000

16.10.2025 14:23 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

We're over 2900 proposals, based on the latest minus earliest id numbers I've seen. Good chance that we hit 3000.

16.10.2025 13:38 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

at 1:40 PM the number was already over 2100

15.10.2025 21:13 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

over 2100 proposals at 1:40 PM.

15.10.2025 17:59 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

who else?

14.10.2025 21:00 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Numbered citations save space. Especially important for Cycle-5 proposals.

14.10.2025 16:20 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Did you read the short story the film is based on? ("Farewell to the Master" by Harry Bates.) Klaatu is not who you think he is.

25.09.2025 01:44 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Exoplanet polarization has a checkered history, but I tend to believe this result, albeit for my own reasons.

25.09.2025 01:29 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

And they probably have a significant effect on the radial velocity of the Sun-as-a-star. The NEID spectra will tell...

25.09.2025 00:52 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Technically, I think he asked about injecting bleach, not drinking it. But that's maybe worse....!

24.09.2025 00:08 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

As I understand the cosmic shoreline, it considers surface gravity with XUV input. Temperature is a third variable, so if the planet is hot enough to have a magma ocean and outgas more atmosphere, that doesn't contradict the shoreline concept. Right? Or am I missing something?

23.09.2025 21:16 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

The Tara Lila trails near Eagle River have nice color in the woods.

22.09.2025 00:25 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
A Reappraisal of The Habitability of Planets around M Dwarf Stars Stable, hydrogen-burning, M dwarf stars make up about 75% of all stars in the Galaxy. They are extremely long-lived, and because they are much smaller in mass than the Sun (between 0.5 and 0.08 M<SUB>...

..but there's THIS:
ui.adsabs.harvard.edu/abs/2007AsBi...

21.09.2025 23:08 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I agree with that. (It's only a hypothesis.)

21.09.2025 23:00 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Just to be clear: the planet is not spatially resolved, so it's an image of the telescope's point spread function, illuminated by light from the planet. The image doesn't show any spatial structure on the planet.

21.09.2025 22:41 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

There is a school of thought that maintains that high energy stellar radiation makes life MORE likely, because it promotes life-developing molecular changes....

21.09.2025 22:33 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

This article concludes that "for habitable worlds, we will have to look elsewhere." But that ignores the Proxima system, where the b planet may have an atmosphere, and potentially habitable conditions. So perhaps I am justified to start packing?

21.09.2025 22:29 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Not correct. It's been 33 years since the first exoplanets were discovered - the pulsar planets. 30 years since 51 Peg b, but the pulsar planets are the first exoplanets.

18.09.2025 22:46 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Not in my overleaf..! For sure it's impressive that planets are more numerous than we ever thought in decades past. But I just can't get excited about the specific number...

18.09.2025 01:43 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

accumulated precipitation maps covering recent time intervals, like 30, 60 days,... etc.

16.09.2025 14:20 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Just south of Eagle River, WI we had pillars almost to the zenith. green and red.

15.09.2025 03:01 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Post image

spectacular green and red aurora lighting up the Big Dipper tonight in Sugar Camp, WI (slightly south of Eagle River)

15.09.2025 02:57 β€” πŸ‘ 28    πŸ” 6    πŸ’¬ 0    πŸ“Œ 0

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