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Andy Rivkin

@asrivkin.bsky.social

6.2K followers 570 following 4.5K posts

Planetary Astronomer on #TeamAsteroid; Gedankenband member/guitarist; “Surprisingly nonchalant” according to Wired. He/him הנני 🌻 Work Output: https://scholar.google.com/citations?user=aGVsk3IAAAAJ Play output: https://andyrivkin.bandcamp.com

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Andy Rivkin @asrivkin.bsky.social · Sep 5

All* of your favorite** planetary scientists on Bluesky, collected into one starter pack for your convenience! Sometimes, we'll even discuss planetary science!

Is your favorite planetary scientist missing? Have them DM me to be added. :) 🧪🔭

go.bsky.app/SdZsrfw

*OK, many of
**plus me

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Andy Rivkin @asrivkin.bsky.social · 1h

wow, progress is really slow on this telescope proposal today, isn't it.

Andy Rivkin @asrivkin.bsky.social · 1h

An email from Zoom with the subject "You are no longer an alternative meeting host" and text saying "You are no longer an alternative host for this meeting, which means that you cannot start and end the meeting. You can still join the meeting as a participant at the specified time.

Meeting ID: Personal Meeting Room
Thank you for choosing ZoomGov."

the recipient, meeting ID, and the person whose personal meeting room is no longer available are redacted.

Sinead O'Connor crying, in a scene from the music video "Nothing Compares 2 U".

Andy Rivkin @asrivkin.bsky.social · 1h

OK, this is as good a place as any to say I am CONVINCED that the reason that deli sandwiches in NY are called "heroes" is because of the proliferation of Greek-owned pizza places, and that it's a bastardization/Americanization of "gyro", generalized to be any type of sandwich they'd sell.

Reposted by Andy Rivkin

Michael Busch @michael-w-busch.bsky.social · 2h

#HeraMission

"ESA’s Hera targets early arrival at Didymos asteroids"

www.esa.int/Space_Safety...

ESA’s Hera targets early arrival at Didymos asteroids

Launched one year ago, on 7 October 2024, the European Space Agency’s Hera mission is roughly halfway to its destination – the Didymos binary asteroid system.At Didymos, Hera will study the aftermath ...

www.esa.int

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Andy Rivkin @asrivkin.bsky.social · 2h

The very fun afterparty for a European rocket launch (a year ago yesterday!) had a photobooth. The group of us there who work together (and worked on DART) wanted to capture the moment. :)

Five people, two male-presenting and three female-presenting, cram in together to appear in a single frame. Behind them are signs and memorabilia including what appears to be a space shuttle, though it's hard to see. The men are in button down shirts, one wears glasses and the other has a beard and straw hat. Two of the women wear glasses, the third has her eyes very open (because she tends to close them in photos, not that you'd otherwise know that). All are smiling.

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Andy Rivkin @asrivkin.bsky.social · 11h

#AlanisMorissetteFirstDraftLyrics

darth™️ @darthbluesky.bsky.social · 11h

thank u potato

strawbaby jam @strawbbfields4ever.bsky.social · 14h

always remember who was there for you at your lowest. thank you cigarettes

Andy Rivkin @asrivkin.bsky.social · 11h

Good job, boys. Let's do that again tomorrow.

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Andy Rivkin @asrivkin.bsky.social · 14h

🔭🧪🛰️

AstroArxiv @astroarxiv.bsky.social · 14h

The Roman Space Telescope as a Planetary Defense Asset. Bryan J. Holler et. al. https://arxiv.org/abs/2508.14412

Monte Carlo simulated orbit fits for the NEO Aten assuming NEO Surveyor astrometry spaced 13 days apart (a) and NEO Surveyor astrometry followed by Roman astrometry 7 days later (b). The yellow dot shows the position of the Sun (not to scale). (c) Orbit clone distributions one month after the las...

Thermophysical model fits for (a) NEO Surveyor photometry only, (b) Roman photometry only, and (c) combined NEO Surveyor and Roman photometry. 1000 Monte Carlo trials (grey lines) were performed using an implementation of the Near-Earth Asteroid Thermal Model (NEATM; [e.g.,][]{Harris1998

(a) Bus-DeMeo spectral archetypes for the three most common asteroid spectral types: C, S, and X {DeMeo2009

$Solar elongation (Sun-observer-target) angles for five representative NEOs over the course of 5 years starting on January 1, 2027. Roman's field of regard spans 54--126$^{$

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Andy Rivkin @asrivkin.bsky.social · 14h

The Beatles used a synthesizer on Here Comes the Sun.

rax ‘levon honkers’ king @raxkingisdead.bsky.social · 17h

you ever think about those real weird overlaps. like tennessee williams might have listened to the ramones

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Andy Rivkin @asrivkin.bsky.social · 16h

😍

Andy Rivkin @asrivkin.bsky.social · 16h

Well, like I said I'm not really a coffee guy. I tended to do the sludge stuff as a kid, at some point I decided that if I was going to try to actually acquire a taste for coffee I should do so with no sugar at all (but lots of milk).

In the end, I just vastly prefer tea. :)

Andy Rivkin @asrivkin.bsky.social · 16h

I've never been a coffee guy, but the sludge left at the bottom of a cup of coffee with way too much sugar in it? That's the stuff.

Faine Greenwood @faineg.bsky.social · 1d

What foods do you love that you fully acknowledge make you a pervert for loving them?

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Andy Rivkin @asrivkin.bsky.social · 22h

Congrats! :)

Reposted by Andy Rivkin

ESA Space Science @science.esa.int · 1d

First images of comet #3I/ATLAS from Europe's Mars orbiters 😍

Observing the comet from 30 million km away, #ExoMars reveals the halo of gas and dust surrounding the comet's nucleus.

Read more 👉 www.esa.int/Science_Expl...
🔭🧪

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Andy Rivkin @asrivkin.bsky.social · 1d

A white paper on which he's third author was submitted to arxiv yesterday that suggests the formation of a UN body to investigate interstellar objects and determine if they're probes sent by extraterrestrial civlilizations, with him in charge.

The community is reacting as you might expect.

Meg Schwamb @megschwamb.bsky.social · 2d

Full arxiv link for those wanting to read the abstract arxiv.org/abs/2510.01405

Advancing Interstellar Science: A Global Framework for Comprehensive Study of Interstellar Objects

The operation of the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) marks a transformative moment in humanity's capacity to detect and characterize interstellar objects (ISOs). Wit...

arxiv.org

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Andy Rivkin @asrivkin.bsky.social · 1d

So, you know, we Yankees fans don't have this particular thing to ruminate about, at least.

Bleacher Nation @bleachernation.bsky.social · 1d

All seven Brewers runs have come with two outs. In case you needed an extra kick to the groin.

Andy Rivkin @asrivkin.bsky.social · 1d

My first Journal Club presentation, done as a first-year graduate student, was on the newly-disovered (and partially retracted) pulsar planets. 🙃

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Reposted by Andy Rivkin

James Davenport @jradavenport.com · 1d

If anyone from the UN wants to talk, here’s a nice summary. The astronomy community does NOT endorse this proposal, just take it from one of THE EXPERTS on ISOs with Rubin. Meg (and many others) has helped the community plan for +10yrs for these kinds of studies.

Meg Schwamb @megschwamb.bsky.social · 2d

I'll for global coordination for ISO follow-up, but it's telling that no one who's actually coordinating follow-up was actually asked to participate in this proposal or thought of to be even suggested as names on committees in this proposal

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Andy Rivkin @asrivkin.bsky.social · 1d

Taco Bell the most obvious example. I lived in Tucson when the world's largest Taco Bell was built, and it did amazing business because people don't go there to have Mexican Food but to get palatable food at a great calories/$ rate.

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Andy Rivkin @asrivkin.bsky.social · 1d

Roberts doing Boone a solid here.

Reposted by Andy Rivkin

SETI Institute @setiinstitute.bsky.social · 1d

Astronomer @allplanets.bsky.social spoke with @asrivkin.bsky.social about Asteroid 2024 YR4, a near-Earth object discovered in late December 2024. Updated calculations indicate a roughly 4% chance that the asteroid could strike the Moon on December 22, 2032. 🧪 🔭

Learn more:

Lunar Impact? Asteroid 2024 YR4 and the Risk to the Moon

www.seti.org

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Reposted by Andy Rivkin

AGU (American Geophysical Union) @agu.org · 1d

We’re on Capitol Hill with 225 Earth & space scientists — including @aas.org and @planetarysociety.bsky.social — urging Congress to reopen the government and protect NASA science. 🚀🌍

Join us: buff.ly/a3YuGgY

#ScienceIsEssential #AGU

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Andy Rivkin @asrivkin.bsky.social · 1d

#StoneRosesFirstDraftLyrics

Dr. SkySkull @drskyskull.bsky.social · 1d

Erin is now my messiah is that weird

Erin Biba @erinbiba.bsky.social · 1d

Unlike Jesus, I have returned.

Andy Rivkin @asrivkin.bsky.social · 1d

Thank you all for your support.

A striped cup of frozen custard with chocolate sprinkles sits on an outdoor table next to a straw trilby.

Andy Rivkin @asrivkin.bsky.social · 1d

packing up right now

Chris Schaller @hicommander.bsky.social · 1d

My friend, I would like to encourage you to go get some ice cream. Also I'll take a mint chocolate chip, three scoops please.

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