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Fred Rasio

@fredrasio.bsky.social
190 followers 185 following 9 posts

Astrophysicist at CIERA

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Fred Rasio @fredrasio.bsky.social · 28/10/2025
aasnova.org/2025/10/28/n...
aasnova.org
Not Their First Rodeo: Gravitational Wave Detectors Spot Merging Black Holes That Have Merged Before
The gravitational wave events GW241011 and GW241110 provide strong evidence for the growth of black holes through successive mergers.
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Fred Rasio @fredrasio.bsky.social · 23/07/2025
aasnova.org
Betelgeuse’s Companion Star May Have Been Seen at Last
Finally found: using speckle imaging, researchers have spotted what is likely the predicted 1.6-solar-mass companion to the red supergiant Betelgeuse.
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Reposted by Fred Rasio
AAS Nova @aasnova.org · 04/06/2025
There’s more than one way to measure the age of a star in a cluster. But do different age-assigning methods agree? aasnova.org/2025/06/04/s... @ufresearch.bsky.social 🔭🧪
aasnova.org
Star-Crossed Clusters: When Ages Are at Odds
If you measure the age of a star using two different methods, do those ages agree? New research shows where our age estimates might be mismatched and what this disagreement could mean.
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Fred Rasio @fredrasio.bsky.social · 28/05/2025
ApJ Letters exoALMA Focus Issue
aasnova.org
Monthly Roundup: A Deep View of Planet-Forming Disks with ALMA
Introducing exoALMA: a survey of 15 large, bright protoplanetary disks that has revealed gas structures that point to potential planet formation.
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Fred Rasio @fredrasio.bsky.social · 04/04/2025
aasnova.org
Spinning Up: Impacts of Stellar Collisions on Binary Black Hole Mergers
How do interactions binary black holes experience in dense star clusters impact the gravitational waves we detect on Earth? Recent simulations show that stellar collisions leave imprints on the masses...
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Reposted by Fred Rasio
American Astronomical Society (AAS) @aas.org · 01/04/2025
NASA has selected 24 new fellows for its prestigious NASA Hubble Fellowship Program. They will begin their programs in the fall at a US university or research center of their choosing. aas.org/posts/news/2...
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Reposted by Fred Rasio
The New York Times @nytimes.com · 03/04/2025
Several Republicans joined Senate Democrats to pass a measure seeking to block some of President Trump’s tariffs on Canada.
nytimes.com
Senate Votes to Rescind Some Trump Tariffs, With G.O.P. Support
A measure to cancel some Canadian tariffs is all but certain to stall in the House. But with a handful of Republicans in favor, the vote sent a signal of opposition to the levies.
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Reposted by Fred Rasio
Sera Markoff @profsera.bsky.social · 12/03/2025
Thanks to @fredrasio.bsky.social, I was pleasantly surprised to learn that our first black hole image paper is in the top 5 most cited papers in the Astrophysical Journal Letters! I'm also sort of shocked that the top 5 cited papers are all about black holes or neutron stars, not exoplanets?! 🔭🧪
Screenshot showing list of top 5 cited papers in the Astrophysical Journal Letters, with the first black hole image paper in position 4!
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Fred Rasio @fredrasio.bsky.social · 08/03/2025
aas.org
AAS Alarmed by Rumored Deep Cuts to NASA and National Science Foundation | American Astronomical Society
Recent reports have indicated that the White House may soon be proposing drastic cuts to future budgets for the National Science Foundation and the NASA Science Mission Directorate.
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Reposted by Fred Rasio
NPR @npr.org · 02/03/2025
Dr. Frances Collins is leaving the National Institutes of Health, where he served as director from 2009 to 2021. The agency is facing cutbacks and restrictions under the Trump administration.
npr.org
Legendary former NIH director retires from embattled agency
Dr. Francis Collins is leaving the National Institutes of Health, where he served as director from 2009 to 2021. The agency is facing cutbacks and restrictions under the Trump administration.
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Reposted by Fred Rasio
Sean Carroll @seanmcarroll.bsky.social · 07/02/2025
The US government has been turned over to a group of extraordinarily ignorant people, and they are working to destroy science in this country. Cutting over half the NSF budget would save < 0.1% of the federal budget, but do incalculable harm. Simply heartbreaking. arstechnica.com/science/2025...
arstechnica.com
White House budget proposal could shatter the National Science Foundation
“This kind of cut would kill American science and boost China.”…
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Reposted by Fred Rasio
The Borowitz Report @borowitzreport.bsky.social · 18/01/2025
Bernie Blasts Trump For Moving Inauguration Inside: “Wear Some Fucking Mittens”
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Fred Rasio @fredrasio.bsky.social · 14/01/2025
www.nytimes.com/2025/01/11/s...
nytimes.com
J. Fraser Stoddart, Who Developed Microscopic Machines, Dies at 82
He grew up playing with model construction sets. As an adult, he tinkered with molecules instead, creating nanomachines and winning a Nobel Prize.
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Fred Rasio @fredrasio.bsky.social · 09/01/2025
ascl.net/wordpress/20...
ascl.net
Sverre Aarseth, father of open source stellar dynamics software, has passed on to a higher orbit – ASCL.net
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Reposted by Fred Rasio
Tod Lauer @todlauer.bsky.social · 08/01/2025
Unbelievable, but horrifically real
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Fred Rasio @fredrasio.bsky.social · 25/12/2024
cnn.com
History-making probe attempts closest-ever approach to the sun | CNN
On Christmas Eve, the Parker Solar Probe was set to become the closest spacecraft to the sun, flying within a few million miles of the solar surface.
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Fred Rasio @fredrasio.bsky.social · 27/09/2023
From Discovery to the First Month of the Type II Supernova 2023ixf aasnova.org/2023/09/27/g...
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