Carnegie Fellow at the Earth and Planets Laboratory. Protoplanetary + circumplanetary disks. Formerly at MPE, BU, and University of Michigan. She/her. #BiInSci 🏳️‍🌈✨🔭 Opinions are my own. sierragrant.comhttps://bsky.app/profile/sierragrant.bsky.socialhttps://bsky.app/profile/sierragrant.bsky.social/post/3mjp5coe2wc2iThis is exactly how I feel. I didn't get into this job, with low salary and a rootless existence well into my 30s (away from my husband!), to outsource the work. I want to do the work, I really REALLY want to do the work. [contains quote post or other embedded content]17 Apr 2026 14:32 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3mjp5coe2wc2ihttps://bsky.app/profile/sierragrant.bsky.social/post/3m76rzjijxs2w@gcugno.bsky.social and I had a wonderful discussion with @goastromo.bsky.social for @setiinstitute.bsky.social LIVE about our work on the circumplanetary disk around CT Cha b! [contains quote post or other embedded content]04 Dec 2025 20:15 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3m76rzjijxs2whttps://bsky.app/profile/sierragrant.bsky.social/post/3lzyfhxhkg22xPRESS RELEASE DAY! Could not be prouder of this result and so happy that it's now out!!! 🤩✨ Thanks to the team at @stsci.edu for the wonderful write-up and image! [contains quote post or other embedded content]29 Sep 2025 16:09 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3lzyfhxhkg22xhttps://bsky.app/profile/sierragrant.bsky.social/post/3lz766olt6c2xToday is a special paper day for me: for the first time we can do chemistry in a circumplanetary disk around a planetary-mass companion! Gabriele Cugno and I used JWST to tease out the signal of CT Cha b, finding a rich carbon chemistry (7 molecules + 1 isotopolog detected)! arxiv.org/abs/2509.1520919 Sep 2025 15:22 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3lz766olt6c2xhttps://bsky.app/profile/sierragrant.bsky.social/post/3lxxxzrr4tc2iFeel free to reach out if you have any questions about Carnegie! It's an amazing place to be a postdoc! [contains quote post or other embedded content]04 Sep 2025 01:18 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3lxxxzrr4tc2ihttps://bsky.app/profile/sierragrant.bsky.social/post/3lvt2q2twq22jAnother MINDS JWST paper! We explore the stark transition from H2O-dominated spectra in Sun-like systems to the carbon-rich chemistry seen for low-mass objects. We don't know exactly what is driving this trend, but we explore the possibilities that may be acting in concert. arxiv.org/pdf/2508.0469207 Aug 2025 15:32 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3lvt2q2twq22jhttps://bsky.app/profile/sierragrant.bsky.social/post/3lvoesddhwc2aNew MINDS paper from Nicolas Kurtovic, focused on binary systems. Spectra, extended emission, variability, multi-observatory analysis -- there's something for everyone! arxiv.org/pdf/2508.0257605 Aug 2025 18:49 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3lvoesddhwc2ahttps://bsky.app/profile/sierragrant.bsky.social/post/3lrt5jklybk2lOur cat, but now in spherical form 😍 [contains quote post or other embedded content]17 Jun 2025 18:42 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3lrt5jklybk2lhttps://bsky.app/profile/sierragrant.bsky.social/post/3lrq7juawhk2sA spotted star, a (very!) misaligned planet, and awesome gifs, what more could you want?! 🤩 [contains quote post or other embedded content]16 Jun 2025 14:40 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3lrq7juawhk2shttps://bsky.app/profile/sierragrant.bsky.social/post/3lrc4meisx22iGreat work by Kielan Hoch and team on this incredible two-planet system!! We will revisit this target with MIRI-MRS next year to hunt for molecules in the disk around planet b, in a program led by Gabriele Cugno and me, and with Kielan's expertise on the system 🥳🪐 [contains quote post or other embedded content]11 Jun 2025 00:10 +0000at://did:plc:o7m7dpplpha4had22kkzpsjo/app.bsky.feed.post/3lrc4meisx22i