Keming Zhang

NASA Hubble/Sagan Postdoc Fellow at MIT | Microlensing, Exoplanets, AI | Prev: UC Berkeley, Columbia University

[Keming Zhang @AstroKeming]

@j_dekoninck Apparently you can spend ~$14000 API credit equivalent on the $200 plan https://t.co/84HoQuZcPF

[SemiAnalysis @SemiAnalysis_]

Recently, we purchased one of each Anthropic/OpenAI subscription plan and randomly ran long horizon coding tasks until we exhausted the weekly limit. It's widely believed that a $200/month plan maxes out at ~$2000/month worth of tokens (assuming API pricing). However, we found that the subscriptions are actually far more generous. (2/4)

[Keming Zhang @AstroKeming]

@j_dekoninck Claude Opus scored near bottom on BrokenArXiv, but near top on the Bullshit Benchmark (https://t.co/XbXNKvcGPb). They appear to test similar skills. Any comments on this?

[Keming Zhang @AstroKeming]

@TingAstro Very interesting work! I competed at the 8th IOAA in 2014 and recall the gold medal line was 90% of the top 3 scores averaged. Did this change recently?

[Keming Zhang @AstroKeming]

@david_kipping Good luck! Will you be staying with a university?

[Keming Zhang @AstroKeming]

I’m excited to share that I’ll be starting as a NHFP Sagan Fellow at @MIT this fall! Look forward to connecting with new/old friends interested in everything Astro and AI.

[Hubble @NASAHubble]

Congratulations to the 2025 class of the NASA Hubble Fellowship Program!

This program enables outstanding postdoctoral scientists to pursue independent research in any area of NASA astrophysics.

Meet the fellows: https://t.co/mBP6LraBma

[Keming Zhang @AstroKeming]

Check out this NYT story on our planet discovery!

H/T @kjb_astro, @jlu_astro, @AgolEric, @bsgaudi, @seankterry, @QuinnKono, et al.

[The New York Times @nytimes]

In six billion years the sun will expand into a red giant, consuming Mercury, maybe Venus and potentially Earth, too.

But astronomers spotted a rocky world orbiting a white dwarf, suggesting a future in which our planet outlives its star. https://t.co/v0USVSz6BZ

[Nature Astronomy @NatureAstronomy]

An Earth-mass planet is inferred to have a white dwarf host, suggesting that terrestrial planets in Earth-like orbits may avoid being engulfed during the red-giant phases of their host stars. @AstroKeming, Zang et al.: https://t.co/JBPYvyjaMT / https://t.co/ilXNsGjHEi @ucsdastro

[Sean Raymond @sraymond_astro]

The coolest paper on @arxiv today has to be this one, on the discovery of an Earth-mass planet and a brown dwarf orbiting a white dwarf.

It makes me think about what happens to a planetary system when its star goes red giant

(short thread)

https://t.co/bmgM8HjFy4

[Keming Zhang @AstroKeming]

Joint work with Weicheng Zang, @kjb_astro, @jlu_astro, Josh Bloom, @AgolEric, @bsgaudi, @seankterry, @QuinnKono, Shude Mao, and Natalie LeBaron

[Keming Zhang @AstroKeming]

We have discovered a 1.9 Earth-mass planet orbiting a White Dwarf at ~2.1 au, around where you would expect to find planet Earth if it could avoid being engulfed by the Red Giant Sun. Also a bonus brown dwarf at ~30 au.

https://t.co/zqhzIFSzjE

[Keming Zhang @AstroKeming]

@PlotAstro I did IAO 2013 and IOAA 2014 😄

[Keming Zhang @AstroKeming]

@miyazaki_shota Looks fantastic!

[Keming Zhang @AstroKeming]

@bmac_astro @seankterry @jlu_astro @profjsb GL758 and HR7672

[Keming Zhang @AstroKeming]

Amazing observing with Keck laser adaptive optics last night! I guess that means I’m now officially an observer? A big shoutout to @jlu_astro @profjsb @seankterry Natalie and our amazing OA/SA Jim and Rita for your support! Guess what we were looking at? (hint: right image)

[Keming Zhang @AstroKeming]

@seankterry @jlu_astro @profjsb And also Titan!

[Keming Zhang @AstroKeming]

@seankterry @jlu_astro @profjsb Guess I’ll learn everything about coronagraphs from @QuinnKono soon!😄

[Keming Zhang @AstroKeming]

@AstroJacobLi @jlu_astro @profjsb @seankterry bulge it is

[Keming Zhang @AstroKeming]

@AJamesMcCarthy Are the two images taken on the same night? If so, would you mind sharing the time stamp the supernova first became visible in your images? @profjsb

[Keming Zhang @AstroKeming]

@bsgaudi Thank you very much Scott! I look forward to your visit in July!

[Keming Zhang @AstroKeming]

Thank you very much Josh! It has been exciting five years working with you!