Geraint F. Lewis's Avatar

Geraint F. Lewis

@cosmichorizons.bsky.social

Cosmologist & Galactic Archaeologist at @Sydney_Uni. Proud Silurian, Australian immigrant, & author of books about the strange universe we find ourselves in!

1,379 Followers  |  710 Following  |  197 Posts  |  Joined: 14.11.2024  |  2.3743

Latest posts by cosmichorizons.bsky.social on Bluesky

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Why do you think we ignore evolution? We wrote about it in our book and in this article. Evolution doesn't save you if there's not even the raw material for life to form - www.royalsoc.org.au/wp-content/u...

01.10.2025 07:23 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

IMHO one of the important things is seeing that Einstein was young when he did this, not a crazy haired old prof. Breakthroughs are the lands of the young.

26.09.2025 21:46 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

As a professional astronomer, I can confirm no. The phases of the moon are not sure to the Earth's shadow.

15.09.2025 09:59 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Thursday afternoon deep thought...

11.09.2025 03:48 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Any chance you will be taking in Australia?

09.09.2025 09:36 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Cosmic Perfection Won’t Last.
YouTube video by Life & The Earth Cosmic Perfection Won’t Last.

πŸ€“ Cosmic Perfection Won’t Last.

06.09.2025 19:22 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

PIA Corgi is Welsh for dwarf dog

04.09.2025 01:15 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

... Oh, oh, oh!! And how about making its easier for staff to succeed in those two things, rather than putting multiple barriers in the way?

03.09.2025 07:39 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

The problem is that the media rarely portrays the negative side (Bicep2 was an exception). But let's see....

02.09.2025 21:30 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Well, my comment is that a media release on an unaccepted preprint often doesn't end well.

02.09.2025 21:08 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Even after being in this country for quarter of a century, bumping into these guys still make me smile.

30.08.2025 07:49 β€” πŸ‘ 10    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

It's not that creature I am scared of, it's what it needs that protection for that does....

28.08.2025 06:17 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

It does! Weekend is just around the corner!

28.08.2025 05:44 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Today is Thursday (at least where I am)

28.08.2025 03:58 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Having fun "vibe mathing" with copilot tonight. I think I'm at the limit of known mathematics and about to break through into something new!

24.08.2025 08:01 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I generally run on inbox 0 - this means most emails get filed or deleted very quickly and simply don't linger.

23.08.2025 22:12 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I have wondered similar about William the Conqueror as surely his name was Guillaume?

23.08.2025 21:52 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

I teach 2 courses per year, one each semester. Sometimes maybe 3 - never 5!

21.08.2025 06:26 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

In Australia, we are just full-time employees and are paid as full-time employees (with holidays, sick leave, superannuation etc etc).

21.08.2025 00:10 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

The greatest trick the Devil ever pulled was convincing Mac PowerPoint users that they have to upload their slides to the session computer before their talk and that their fonts and animations will not be screwed up.

17.08.2025 22:34 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Spotted at Central Station, Sydney - that's quite a train ride.

13.08.2025 06:33 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Spotted at Central Station, Sydney - that's quite a train ride.

13.08.2025 06:32 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thanks for the insight - it just doesn't look like the shadows I've seen from Hiroshima.

13.08.2025 01:30 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Come on down on Saturday to hear a bunch of awesome science talks - including one on how we are building huge radio telescopes and finding tiny stars!
β˜„οΈπŸ”­πŸ§ͺ

12.08.2025 04:41 β€” πŸ‘ 14    πŸ” 7    πŸ’¬ 1    πŸ“Œ 0

For those in Sydney on Saturday afternoon, I will be speaking all about cosmology and the Big Bang at this event at the very nice Chau Chak Wing Museum

12.08.2025 03:40 β€” πŸ‘ 6    πŸ” 3    πŸ’¬ 1    πŸ“Œ 0
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Not sure the word "Even" is necessary in this headline!

13.08.2025 00:14 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Dear teachers of special relativity - please stop telling students that special relativity can't handle acceleration and they have to wait for general relativity for that. ThX

09.08.2025 21:58 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Being the 80th anniversary of the bombing of #Hiroshima, this image is doing the rounds as a flash shadow of a person. However, I suspect this is not what this is, as it is much more distinct than other shadows and doesn't appear to have a history before 10-15 yrs ago. Anyone have details?

06.08.2025 12:21 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

And, of course, there was an astronomer royal of Ireland until 1922.

30.07.2025 20:07 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

Afaik there has been no new appointment or discussion about the position πŸ˜•

30.07.2025 07:40 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 4    πŸ“Œ 0

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