William (Will) Cerny
@wcerny.bsky.social
Astronomer-in-training. Formerly: Univ. of Chicago, now at Yale Astronomy. Big fan of the Milky Way and its satellite galaxies! he/him
https://wcerny.github.io/site/
https://wcerny.github.io/site/
Reposted by William (Will) Cerny
In Michelle's second paper, she updates us all on the offensively faint Ursa Major III/UNIONS 1 stellar association. Is it a galaxy wtih dark matter or a star cluster? This new paper searches for signs of dark matter and/or binary stars to answer this question! arxiv.org/abs/2510.02431 🔭 ☄️
October 27, 2025 at 11:35 AM
In Michelle's second paper, she updates us all on the offensively faint Ursa Major III/UNIONS 1 stellar association. Is it a galaxy wtih dark matter or a star cluster? This new paper searches for signs of dark matter and/or binary stars to answer this question! arxiv.org/abs/2510.02431 🔭 ☄️
So exciting!!
First Light for 4MOST!
The 4-metre Multi-Object Spectroscopic Telescope (4MOST) has captured its very first spectra!
Video Credit: AIP/R. de Jong, AIP/K. Riebe, AIP/A. Saviauk, CRAL/J.-K. Krogager
The 4-metre Multi-Object Spectroscopic Telescope (4MOST) has captured its very first spectra!
Video Credit: AIP/R. de Jong, AIP/K. Riebe, AIP/A. Saviauk, CRAL/J.-K. Krogager
First Light for 4MOST!
YouTube video by 4-meter Multi-Object Spectroscopic Telescope
youtu.be
October 21, 2025 at 9:36 PM
So exciting!!
Reposted by William (Will) Cerny
ARP! ARP! ARP! ☄️🔭 arxiv.org/abs/2509.09011
September 12, 2025 at 2:55 AM
ARP! ARP! ARP! ☄️🔭 arxiv.org/abs/2509.09011
Reposted by William (Will) Cerny
"[Vera] Rubin addressed the [1996] graduating class at the University of California, Berkeley, saying: 'I hope that you will fight injustice and discrimination in all its guises'" 🔭
Got quoted as one of the alarmed scientists in this piece by @skuthunur.bsky.social on the editing of Vera Rubin's biography
🧪🎢🔭
www.space.com/the-universe...
🧪🎢🔭
www.space.com/the-universe...
Scientists alarmed as Rubin Observatory changes biography of astronomer Vera Rubin amid Trump's push to end DEI efforts
"The idea that they can somehow obliterate these sources is dead wrong — scientists in general and astronomers in particular are not going to take these threats lying down."
www.space.com
February 11, 2025 at 5:41 PM
"[Vera] Rubin addressed the [1996] graduating class at the University of California, Berkeley, saying: 'I hope that you will fight injustice and discrimination in all its guises'" 🔭
Reposted by William (Will) Cerny
Looking for a last minute holiday gift?
Mia and the Martians is a new children’s book by myself and @tanyaofmars.bsky.social all about a little girl and her cat, Nebula, who go to Mars for her science fair. They meet the rovers and learn science and emotional lessons from each one
amzn.to/4fvtBuQ
Mia and the Martians is a new children’s book by myself and @tanyaofmars.bsky.social all about a little girl and her cat, Nebula, who go to Mars for her science fair. They meet the rovers and learn science and emotional lessons from each one
amzn.to/4fvtBuQ
Mia and the Martians (Mia Explores)
Mia and the Martians (Mia Explores) [Louden, Emma, Harrison, Dr. Tanya, Pasman, Wouter] on Amazon.com. *FREE* shipping on qualifying offers. Mia and the Martians (Mia Explores)
amzn.to
December 20, 2024 at 6:49 PM
Looking for a last minute holiday gift?
Mia and the Martians is a new children’s book by myself and @tanyaofmars.bsky.social all about a little girl and her cat, Nebula, who go to Mars for her science fair. They meet the rovers and learn science and emotional lessons from each one
amzn.to/4fvtBuQ
Mia and the Martians is a new children’s book by myself and @tanyaofmars.bsky.social all about a little girl and her cat, Nebula, who go to Mars for her science fair. They meet the rovers and learn science and emotional lessons from each one
amzn.to/4fvtBuQ
Reposted by William (Will) Cerny
Aaand our next Aeos paper is out as well!!
Jennifer Mead leads the paper, finding feedback blows out all metals from early halos until they reach a mass of about 10^7 Msun. Read it here: arxiv.org/abs/2411.14209
Jennifer Mead leads the paper, finding feedback blows out all metals from early halos until they reach a mass of about 10^7 Msun. Read it here: arxiv.org/abs/2411.14209
November 22, 2024 at 4:13 PM
Aaand our next Aeos paper is out as well!!
Jennifer Mead leads the paper, finding feedback blows out all metals from early halos until they reach a mass of about 10^7 Msun. Read it here: arxiv.org/abs/2411.14209
Jennifer Mead leads the paper, finding feedback blows out all metals from early halos until they reach a mass of about 10^7 Msun. Read it here: arxiv.org/abs/2411.14209
Reposted by William (Will) Cerny
🔭 Paper announcement! With @alexji.bsky.social, @wcerny.bsky.social, and a host of others, we analyze some of the first spectroscopy of stars in compact (r < 10 pc), ultra-faint Milky Way satellites in arxiv.org/abs/2410.08276. Our two target systems are highlighted here:
October 14, 2024 at 8:14 PM
🔭 Paper announcement! With @alexji.bsky.social, @wcerny.bsky.social, and a host of others, we analyze some of the first spectroscopy of stars in compact (r < 10 pc), ultra-faint Milky Way satellites in arxiv.org/abs/2410.08276. Our two target systems are highlighted here:
Reposted by William (Will) Cerny
Our paper on the Barbenheimer Star is now published in ApJL! iopscience.iop.org/article/10.3... We at @sdssurveys.bsky.social find evidence for an ancient explosion of an unusually massive star that should have collapsed to a black hole. Thread and 🔭
Image: UChicago/SDSS-V/Melissa Weiss
Image: UChicago/SDSS-V/Melissa Weiss
January 31, 2024 at 4:41 PM
Our paper on the Barbenheimer Star is now published in ApJL! iopscience.iop.org/article/10.3... We at @sdssurveys.bsky.social find evidence for an ancient explosion of an unusually massive star that should have collapsed to a black hole. Thread and 🔭
Image: UChicago/SDSS-V/Melissa Weiss
Image: UChicago/SDSS-V/Melissa Weiss
Reposted by William (Will) Cerny
Okay, this is pretty cool -- Vera Rubin will be on 2025 American quarters!! 🔭 www.usmint.gov/news/press-r...
October 19, 2023 at 1:34 PM
Okay, this is pretty cool -- Vera Rubin will be on 2025 American quarters!! 🔭 www.usmint.gov/news/press-r...
I'm a day late, but I wanted to advertise the latest paper from the DES and DELVE collaborations, led by Mitch McNanna! The paper's results include the discovery of a *very* diffuse (resolved) dwarf galaxy candidate near the LMC-mass host NGC 55 (D ~ 2 Mpc). Read it here:
arxiv.org/abs/2309.04467
arxiv.org/abs/2309.04467
September 13, 2023 at 2:27 AM
I'm a day late, but I wanted to advertise the latest paper from the DES and DELVE collaborations, led by Mitch McNanna! The paper's results include the discovery of a *very* diffuse (resolved) dwarf galaxy candidate near the LMC-mass host NGC 55 (D ~ 2 Mpc). Read it here:
arxiv.org/abs/2309.04467
arxiv.org/abs/2309.04467