Mark Cheung
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markcheung.bsky.social
Mark Cheung
@markcheung.bsky.social
Astro | Helio | Space Weather | ML
Science Director, Space & Astronomy @CSIRO; OMO
Reposted by Mark Cheung
Statistically, our current four-transit spectrum of TRAPPIST-1e can also be fit by a flat line (i.e. a featureless spectrum). So we can't rule out a bare rock with these data.

There's also the important caveat that an incomplete stellar contamination correction could also imprint spectral features.
September 9, 2025 at 11:14 PM
Reposted by Mark Cheung
This includes working with all these excellent partners:

- Intl. Science School
- @spaceaustralia.com
- @sydney.edu.au
- @ozgrav.bsky.social
- ARC CoE Dark Matter
- Swinburne Uni.
- Wheeler Centre
- @queersinscience.bsky.social

Keep an eye out for event pages and ticket links!

2/3 🔭
May 15, 2025 at 9:44 PM