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Daniel Apai

@danielapai.bsky.social
627 followers 115 following 19 posts

Professor of Astronomy, Planetary Sciences, and Optics at The University of Arizona. I study exoplanets, build telescopes, and lead the NASA-funded Alien Earths astrobiology team. Fellow of AAAS and The Explorers Club. Own opinions.

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Daniel Apai @danielapai.bsky.social · 29/05/2026
How can we build powerful space telescopes faster? Great ideas and lots of positive energy at the 2-day NASA meeting in D.C. on Accelerating Innovation for Astrophysics missions! It was great to see friends and colleagues, and work on an even brighter and fast-paced future for NASA astrophysics!
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Daniel Apai @danielapai.bsky.social · 13/02/2026
What if Earth-sized HZ worlds don’t have exactly Earth-like climate feedbacks? Climate Chaos, Snowballs, run-aways - but also many temperate yet not-Earth-like worlds! Congrats to Chaucer Langbert on this cool study! arxiv.org/abs/2602.10369 @uarizonalpl.bsky.social @stewardobservatory.bsky.social
arxiv.org
Not Earth-like Yet Temperate? More Generic Climate Feedback Configurations Still Allow Temperate Climates in Habitable Zone Exo-Earth Candidates
Earth's climate is influenced by over a dozen feedbacks, but only three dominate its long-term climate behavior. Models of the exoplanet habitable zone (HZ) assume that this is similar for other Earth...
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Daniel Apai @danielapai.bsky.social · 12/01/2026
Pandora is up in orbit! But how did the launch feel, up close and personal? Read my blog about my experience: distantearths.com/how-did-the-...
distantearths.com
How did the launch *feel*?
An incredible 24 hours! After a picture-perfect launch, Pandora is now in orbit, with solar panels deployed and alive (receiving commands from ground! After seven years of working on this project, …
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Daniel Apai @danielapai.bsky.social · 11/01/2026
Our NASA’s Pandora space telescope is on orbit!! Congrats to the team and NASA, LSP, SpaceX, and everyone who helped to get to this exciting point! What will Pandora do and why is it important for exoplanet science? Read my short article on this: theconversation.com/nasas-pandor...
theconversation.com
NASA’s Pandora telescope will study stars in detail to learn about the exoplanets orbiting them
The findings from Pandora will complement data from the James Webb Space Telescope to give astronomers more insight into stars and planets outside our solar system.
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Daniel Apai @danielapai.bsky.social · 05/01/2026
Spotted a Sonora bobcat this morning just when it snatched a white-winged dove. Such a beautiful animal!
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⭐ ᗰᗩᖇᛕ ᗩ. ǤᗩᖇᒪIᑕᛕ ⭐ @markgarlick.com · 20/12/2025
#ArtAdventCalendar day 20. Already! Here's an animation of a space elevator. Made with #Blender3d because of course. #SciArt #spaceart Please repost 😊
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Daniel Apai @danielapai.bsky.social · 06/11/2025
Countdown clock in @stewardobservatory.bsky.social for our NASA Pandora Space Telescope: T-60 days!! Our team is getting ready for the launch of this incredibly exciting mission to explore worlds beyond the Solar System! #exoplanets @uazresearch.bsky.social @uarizonalpl.bsky.social
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Daniel Apai @danielapai.bsky.social · 07/10/2025
I had fun talking about exoplanets and search for habitable worlds at The Explorers Club live event in Sedona. Sam Schwann, underwater explorer and artist followed with very cool videos of ocean exploration and swimming with sharks! Will do this again soon - next time in Tucson!
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Daniel Apai @danielapai.bsky.social · 22/08/2025
Enjoyed talking w Bruce Dorminey in Iceland about our universal framework to assess which exoplanets & moons may be habitable. Key for search for life beyond Earth! His story: @forbes.com www.forbes.com/sites/bruced... @stewardobservatory.bsky.social @uarizonalpl.bsky.social @uarizona.bsky.social
forbes.com
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Daniel Apai @danielapai.bsky.social · 30/07/2025
Much enjoyed last week's Sagan Summer School. Great to see friends, colleagues, & meet early-career scientists! My lecture and blog post on the future of exoplanet/sub-neptune research are now online: www.youtube.com/watch?v=JSzY... distantearths.com/sub-neptunes... @stewardobservatory.bsky.social
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Steward Observatory, University of Arizona @stewardobservatory.bsky.social · 29/07/2025
For 40 years, Michelle Cournoyer has supported students and faculty, solved problems, and shown up with heart. As she prepares to retire this August, we celebrate the impact of a true Steward Observatory legend: bit.ly/3GWkAQv
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Harshitha M Parashivamurthy @harshithamysore.bsky.social · 25/07/2025
Exoplanet demographics are key: Integrative. A key point from today's talk by Daniel Apai at #sagan2025 on future prospects of key planetary processes and trends in the sub-Neptune population. #exoplanets
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The Conversation U.S. @us.theconversation.com · 04/06/2025
A new model helps scientists assess whether environments on alien worlds could support specific forms of life, real or hypothetical, based on known biological limits and uncertain data. By @danielapai.bsky.social @uarizona.bsky.social: buff.ly/M4VdDsu
theconversation.com
New model helps to figure out which distant planets may host life
As NASA rolls out more powerful telescopes in the future, scientists will need a way to determine where to point them. A new approach could help.
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Steward Observatory, University of Arizona @stewardobservatory.bsky.social · 03/06/2025
When is an alien world habitable? Steward Observatory's @danielapai.bsky.social explores this question in his latest article in The Conversation: bit.ly/43vZKQw
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Steward Observatory, University of Arizona @stewardobservatory.bsky.social · 23/04/2025
With all the buzz about the latest potential sign of life on a distant planet, Steward Observatory's astronomy professor @danielapai.bsky.social puts the discovery in context. Read his take: bit.ly/3S1fYKB
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Kevin Hardegree-Ullman @kevinkhu.bsky.social · 18/04/2025
While we're on the topic of biosignatures, I'd like to re-up my last two papers about the challenges of observing O₂ (a key biosignature) on 𝘌𝘢𝘳𝘵𝘩-𝘭𝘪𝘬𝘦 exoplanets with the biggest upcoming optical/IR telescopes ever built: ui.adsabs.harvard.edu/abs/2025AJ..... ui.adsabs.harvard.edu/abs/2023AJ.....
ui.adsabs.harvard.edu
Bioverse: Giant Magellan Telescope and Extremely Large Telescope Direct Imaging and High-resolution Spectroscopy Assessment—Surveying Exo-Earth O<SUB>2</SUB> and Testing the Habitable Zone Oxygen Hypo...
Biosignature detection in the atmospheres of Earth-like exoplanets is one of the most significant and ambitious goals for astronomy, astrobiology, and humanity. Molecular oxygen is among the strongest...
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Daniel Apai @danielapai.bsky.social · 12/04/2025
Exciting nights! We are integrating the first prototype telescope based on Nautilus multi-order diffractive optics! At Mt Lemmon Sky Center. Our telescope is unique, custom-built to demonstrate broadband imaging with a light, flat lens! @stewardobservatory.bsky.social @uarizona.bsky.social
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Mark Marley @markmarley.bsky.social · 05/04/2025
Here is a great postdoc opportunity at LPL with Sukrit Ranjan to study photochemistry and atmospheric escape for terrestrial planets. arizona.csod.com/ux/ats/caree...
arizona.csod.com
Postdoctoral Research Associate I (Lunar and Planetary Laboratory)
The successful applicant will conduct original research in collaboration with Prof. Sukrit Ranjan and his group related to the composition and structu...
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Kevin Hardegree-Ullman @kevinkhu.bsky.social · 27/02/2025
PUBLISHED!!! Go check out IF we will be able to look for a key biosignature (oxygen!) with the Giant Magellan Telescope and the Extremely Large Telescope! 🔭🪐🧪 iopscience.iop.org/article/10.3...
iopscience.iop.org
Bioverse: Giant Magellan Telescope and Extremely Large Telescope Direct Imaging and High-resolution Spectroscopy Assessment—Surveying Exo-Earth O2 and Testing the Habitable Zone Oxygen Hypothesis - IOPscienceSearchopens in new tab
Bioverse: Giant Magellan Telescope and Extremely Large Telescope Direct Imaging and High-resolution Spectroscopy Assessment—Surveying Exo-Earth O2 and Testing the Habitable Zone Oxygen Hypothesis, Hardegree-Ullman, Kevin K., Apai, Dániel, Haffert, Sebastiaan Y., Schlecker, Martin, Kasper, Markus, Kammerer, Jens, Wagner, Kevin
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Mark Marley @markmarley.bsky.social · 22/02/2025
The Art of Planetary Science is in full swing at @uarizonalpl.bsky.social Come visit this weekend!
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Catalina Sky Survey @catalinaskysurvey.bsky.social · 13/02/2025
Happy to announce we have joined BlueSky and look forward to sharing information about the amazing discoveries we make at CSS. Stick around for some neat stuff! #astronomy #asteroids #planetarydefense
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Steward Observatory, University of Arizona @stewardobservatory.bsky.social · 13/02/2025
Glen Schneider (1955–2025) was a self-confessed "umbraphile" -- a "shadow-lover" who pursued solar eclipses around the globe and earned a world record for the greatest number of total solar eclipses ever experienced. Read about his work and lasting legacy: bit.ly/4hVUaet
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Daniel Apai @danielapai.bsky.social · 06/02/2025
Glenn was an exceptional scholar and kind colleague whose office door was always open. His debris disk images will continue to inspire. As a dedicated solar eclipse chaser, he captured the rare ethereal beauty of science around the globe. Ad Astra, Glenn! nicmosis.as.arizona.edu:8000/UMBRAPHILLIA...
nicmosis.as.arizona.edu
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Daniel Apai @danielapai.bsky.social · 02/02/2025
I am thrilled to speak in the College of Science Lecture Series "Can We Talk?". On March 27, Chris Impey and I will explore a really cool topic: communicating with alien civilizations! science.arizona.edu/community-en... @stewardobservatory.bsky.social @uarizona.bsky.social @uarizonalpl.bsky.social
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Daniel Apai @danielapai.bsky.social · 31/01/2025
Excellent study of a very exciting substellar companion in the Pleiades!
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Julien Girard @juliengirard.space · 03/01/2025
Unlike in 2024 I won't be offering a topic this year but this is really a unique program for students in astrophysics, software engineering, instrument calibration/support, and public outreach/scientific writing. Check out the SASP @spacetelescope.bsky.social & apply! www.stsci.edu/opportunitie...
stsci.edu
Space Astronomy Summer Program
Fostering hands-on astronomy, engineering, and public outreach project opportunities to serve upper-division undergraduate students.
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Daniel Apai @danielapai.bsky.social · 30/12/2024
A great visit to White Sands National Park. We enjoyed a hike deep into the dune fields. Amazing wind-sculpted landscape! Pretty cool that the gypsum ultimately originates from layers deposited by the Permian Sea on the Pangea supercontinent about 250 million years ago!
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Ilaria Pascucci @pascucci.bsky.social · 11/12/2024
Have questions to NASA Astrophysics Division Director and about Program Analysis Groups? Attend the Joint PAG Session at the AAS on January 12. More info here: cor.gsfc.nasa.gov/copag/meetin...
cor.gsfc.nasa.gov
Cosmic Origins (COR)
Web site for the NASA Cosmic Origins Program
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Daniel Apai @danielapai.bsky.social · 10/12/2024
Our exoplanets and astrobiology research group – what a thrill to work with this amazing team on exploring new worlds! @gabeweible.bsky.social @stewardobservatory.bsky.social @bemiles.bsky.social @sailorsupernova.bsky.social @matthewmurphy.bsky.social @kevinkhu.bsky.social
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HiRISE Beautiful Mars (NASA) @uahirise.bsky.social · 30/11/2024
An Impact in Elysium Planitia This image shows an impact crater in Elysium Planitia that was first discovered by the Mars Context Camera that formed between February 2012 and June 2014. More: uahirise.org/hipod/ESP_03... NASA/JPL-Caltech/University of Arizona #Mars #science #NASA
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Steward Observatory, University of Arizona @stewardobservatory.bsky.social · 21/11/2024
Exploring Tucson? The New York Times recommends heading to the Mt. Lemmon SkyCenter, where scientists lead "staggering viewings through giant telescopes." Be sure to book your viewing! skycenter.arizona.edu/news/nyt-spe...
skycenter.arizona.edu
The NYT Spends 36 Hours in Tucson - Including the Mt. Lemmon SkyCenter
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Daniel Apai @danielapai.bsky.social · 21/11/2024
I am honored to be elected Fellow of The Explorers Club! Very excited to join this renowned group of explorers who have been leading and supporting scientific expeditions for over a century. www.explorers.org Here's to exploring Earth and new worlds like it!
explorers.org
The Explorers Club
The Explorers Club is an international organization dedicated to the advancement of field exploration and scientific inquiry. Meet us!
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Mark Marley @markmarley.bsky.social · 27/03/2024
The Lunar and Planetary Lab is thrilled to be going back to the moon with astronauts on Artemis III.
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Daniel Apai @danielapai.bsky.social · 08/03/2024
It was fun to answer Chris Young’s questions on our Nautilus Space Observatory for his Interesting Engineering article — which includes photos of our latest lens prototype! It is time to rethink how we build space telescopes! interestingengineering.com/innovation/j... youtu.be/0aPhoYISwOI?...
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Gabe Weible @gabeweible.bsky.social · 07/01/2024
🔭🪐I am presenting my work with Kevin Wagner et al. on LBTI imaging of a circumbinary Pleiades brown dwarf at AAS tomorrow the 8th, 9–10 am CT! Come check out my poster at the Extrasolar Planets: Direct Imaging I session in Hall B-1/B-2, or view it here: aas243-aas.ipostersessions.com/Default.aspx...
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