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Rebecca Oppenheimer

@roppenhe.bsky.social
557 followers 23 following 40 posts

Astrophysicist, Writer, Degenerate beccasubstellar.com or rebeccaoppenheimer.com

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Rebecca Oppenheimer @roppenhe.bsky.social · 12/02/2026
A lot of it involves Palomar, of course. 😉
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Rebecca Oppenheimer @roppenhe.bsky.social · 11/02/2026
I am delighted to share this announcement of my debut novel!
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Rebecca Oppenheimer @roppenhe.bsky.social · 19/10/2025
Well, my dear, you don't think that there is anything static in the universe, do you? Even the climate rotates. Everything moves, nothing remains the same, including your neighborhood. Let it all change and spin.
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Rebecca Oppenheimer @roppenhe.bsky.social · 19/10/2025
😂
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Rebecca Oppenheimer @roppenhe.bsky.social · 18/10/2025
And now for something completely different: For the best time call +1-303-499-7111 it's best to call at the top of the hour, but anytime works.
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Rebecca Oppenheimer @roppenhe.bsky.social · 18/10/2025
They just removed it, with no explanation.

Bluesky Moderation Team
6:15 AM (8 minutes ago)
to me

Hi there,

Thank you for getting back. We appreciate your immediate response to this matter.

Recently, we applied a label to a Bluesky account you control (@roppenhe.bsky.social) for violations of our guidelines. After a thorough review, we found out that the action applied to your account was incorrect. We apologize for any inconvenience this may have caused.

Consequently, we are revising our initial decision and have removed the label on your account.

Thank you for doing your part to keep Bluesky a welcoming and empowering place for all users.
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Rebecca Oppenheimer @roppenhe.bsky.social · 18/10/2025
Except then they told me to post anything on twitter to validate my identity. This is either an elaborate scam or something worse.
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Rebecca Oppenheimer @roppenhe.bsky.social · 18/10/2025
Thanks @davidho.bsky.social. There is something clearly dysfunctional about this platform. I posted something too. They throw libel at me and I am going to sue, and sue big time.
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Rebecca Oppenheimer @roppenhe.bsky.social · 08/10/2025
One of the best stamps ever from the USPS. Thank you, @uspostal.bsky.social and @apwu.bsky.social
A stamp from 1948 depicting Palomar Observatory
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Rebecca Oppenheimer @roppenhe.bsky.social · 08/10/2025
Defenestration is occasionally useful, one might suppose. I'd never conduct such behavior except in self defense.
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Rebecca Oppenheimer @roppenhe.bsky.social · 08/10/2025
Well, a nice manicure.
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Rebecca Oppenheimer @roppenhe.bsky.social · 08/10/2025
I love stamps and the USPS. Here are two new examples of expedited or same day delivery stamps that feature astrophysics. These I got recently to move physical items swiftly through the mail, and the mail is one of the most fabulous things we have in the US.
US stamps with astrophysics themeUS stamps with astrophysics theme
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Rebecca Oppenheimer @roppenhe.bsky.social · 08/10/2025
This is a real storm. I love storms. It's the storms, not the harsh Sun, that create life.
Enormous dark storm front arriving in the city
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Rebecca Oppenheimer @roppenhe.bsky.social · 28/09/2025
That's it. A poster at the conference I mentioned. 🙂
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Rebecca Oppenheimer @roppenhe.bsky.social · 28/09/2025
He is clean.
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Rebecca Oppenheimer @roppenhe.bsky.social · 28/09/2025
This is great, thank you. It also confirms what I wrote, although in substantially more detail. Part of this I knew but thank you for providing more context. Fantastic! Thank you.
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Rebecca Oppenheimer @roppenhe.bsky.social · 28/09/2025
It wasn't really a clean room. As you can see, the instrument is sealed up.
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Rebecca Oppenheimer @roppenhe.bsky.social · 28/09/2025
Here is the poster that Paco presented about what it is like to be an astrodog, Chapter IV. He presented it in the front of the room at a conference in Delaware some years ago. The Brown Dwarf-Exoplanet Connection Conference (BDExoCon) at the University of Delaware, Newark, October 2019.
Dog poster about astronomical observations
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Rebecca Oppenheimer @roppenhe.bsky.social · 28/09/2025
Here is Paco, guarding PARVI, an instrument my team and I deployed and have now automated to understand what our solar system might look like from ~30 light years away. Paco is gone now, but he had true pride as our spokesdog for two projects. He had a paper published and went to Palomar 10 times.
Paco, the astrodog on top of Parvi, an astronomical instrument in use at Palomar
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Rebecca Oppenheimer @roppenhe.bsky.social · 26/09/2025
The pair are so far away that they likely aren't much influenced in that manner, but we have no idea how such a complex system formed. It's wonderfully fascinating!
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Rebecca Oppenheimer @roppenhe.bsky.social · 26/09/2025
These days pixels are rather ordinary, but perhaps not Ordinary.
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Rebecca Oppenheimer @roppenhe.bsky.social · 26/09/2025
Do you have a reference for that? I'd love to read it.
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Rebecca Oppenheimer @roppenhe.bsky.social · 26/09/2025
Very helpful! Thank you. @davidho.bsky.social also told me I should to this.
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Rebecca Oppenheimer @roppenhe.bsky.social · 26/09/2025
So she'd be a Jarutechi?
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Rebecca Oppenheimer @roppenhe.bsky.social · 26/09/2025
We certainly can. The technology now is so far superior to the imaginings of the early zoning laws.
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Rebecca Oppenheimer @roppenhe.bsky.social · 26/09/2025
Normalize this to population. In 1914 when the first zoning laws in the world came into effect in Manhattan, more than 2 million people lived below 14th street. These data need context. Manhattan is only about 1.6M now. It should be well over 55M as the 1914 law suggested and imagined for the future
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Rebecca Oppenheimer @roppenhe.bsky.social · 26/09/2025
I am an amateur urbanist and futurist, but these numbers need to be normalized to the population. 50,000 new apartments or huts in outer boroughs is about 0.5% growth per capita. In a city where the occupancy rate is well over 99.5%, hundreds of times this level of development is needed. Up not out!
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
Thank you. As you can tell, I'm a newbie at bluesky.
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
Haha, that's a great story!
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
Have you ever thought about the origin of the word pixel? In footnote 114 or so of my book, minor changes to come, before I get it out there, you might find something like this, well, fun! Let this post be a teaser.
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
Very few know what a cyanotype is. Delighted that you noticed that. That was work with liahollan.com, my first artist in residence and dear friend. @liahalloran.bsky.social
liahollan.com
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
My robot vomited in my lab. It's ok. We cleaned it up.
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
A dear friend and colleague @climateofgavin.bsky.social. I got my first science job at NASA GISS eons ago.
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
Regarding Gliese 229B, seen first in 1994 by me: a team lead by Jerry Xuan revealed it to be two strange worlds whipping around each other every twelve days as they orbit a nearby star with other companions or planets. Binary worlds are no longer sci-fi. They exist. www.caltech.edu/about/news/i...
caltech.edu
It's Twins! Mystery of Famed Brown Dwarf Solved
Astronomers have discovered that a well-studied brown dwarf is in fact two that are orbiting closely around each other
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
It's two! www.caltech.edu/about/news/i...
caltech.edu
It's Twins! Mystery of Famed Brown Dwarf Solved
Astronomers have discovered that a well-studied brown dwarf is in fact two that are orbiting closely around each other
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
Thank you!
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
This means the world to me. More to come. I hope you enjoy it. I'll post new or old stuff now and then. Thank you!
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
There is a lot of telemetry and metrology in what I do! 🙂
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Rebecca Oppenheimer @roppenhe.bsky.social · 25/09/2025
I did indeed. The term is really "brown dwarf" but "planets" and brown dwarfs as well as stars are all interrelated.
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Rebecca Oppenheimer @roppenhe.bsky.social · 24/09/2025
Hello people! I'm a professor and curator of astrophysics at the American Museum of Natural History. I study strange new worlds in the solar neighborhood. If you want to learn more about my work: beccasubstellar.com
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