Leigh Fletcher

@LeighFletcher

Planetary scientist, Dad-in-training, space enthusiast, Research Fellow and Associate Professor based at the .

Vrijeme pridruživanja: veljača 2009.

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  1. Prikvačeni tweet
    10. sij

    Announcing the UK Solar System Planetary Atmospheres meeting, to be held on Feb 14th. All are welcome, and contributed abstracts can be sent directly to me by Jan 31st. Attn:

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  2. prije 20 sati

    Thought having a 6-yr-old meant my dinosaur knowledge had peaked. But then I discovered "Rise and Fall of the Dinosaurs" by . Incredible book with a real sense of deep time: even mentions "Jane," the adolescent T-Rex from Hell Creek, Montana - cast at

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  3. proslijedio/la je Tweet
    4. velj

    Two weeks on from the largest-ever gathering of Ice Giant scientists, engineers, mission planners and policymakers, the team have published a draft statement of outcomes from the meeting to capture the key discussions (cc ):

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  4. 3. velj

    With more than 30 abstracts received, we had a hard time squeezing everything in, but here's a first draft of our programme for the meeting on Feb 14th:

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  5. proslijedio/la je Tweet
    30. sij

    Today marks the last day of operation for my favourite telescope, the Spitzer Space Telescope. I've been using, and will continue to use its data for my entire PhD. ❤️

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  6. 30. sij

    To our newest colleague in Leicester's Planetary Atmospheres team , we wish you the very best of luck in your PhD viva tomorrow!

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  7. 29. sij

    Abstract deadline is this Friday! Do come and join us in London for the meeting.

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  8. 29. sij

    "Only a 12 percent confidence level for the project’s ability to meet the March 2021 launch..." "70 percent baseline confidence level is associated with a July 2021 launch date..." Clouds on the horizon, but Webb has to work.

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  9. 28. sij

    Absolute pleasure to host Thomas Greathouse of here for the past week, discussing future ideas for our ground-based IR observations with TEXES, and showcasing Juno UV observations of Jupiter's aurora. So many things we can do with these data!

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  10. proslijedio/la je Tweet
    26. sij

    i have a hammer and now everything is a nail

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  11. proslijedio/la je Tweet

    Hello world! This is the account for our ESO workshop on ground-based thermal-IR astronomy! End of March at Garching; remote attendance FREE! Programme out in ~2 weeks.

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  12. 22. sij

    Perfect timing, as is happening here in right now, advocating for an ambitious robotic mission to explore the . From all the scientists here in London, we wish the RAS a very happy 200th birthday!

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  13. 22. sij

    Agustin Sanchez-Lavega provides an excellent Basque-Beret analogue for the vertical structure of dark vortices on Neptune - thin and featureless from the top, but hiding a wealth of exciting structure below

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  14. 22. sij

    To give you some idea of how little we know of the , we still don’t know the proportion of rocks and ices buried within. As my good friend Nick Teanby suggests, maybe this should actually be ... need a mission to figure this out!

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  15. 22. sij

    Guillot: Uranus and Neptune are key because the methane-cloud condensation region is easily accessible, allows us to understand moist convection and inhibition in a hydrogen rich atmosphere. Hard to do this elsewhere.

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  16. 22. sij

    Hard to explain the condensate depletion on Jupiter by just considering rain, so Guillot is trying to shake up the planetary meteorology community with his idea of “mush balls”, big lumps of hail that fall and drag gases down deep.

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  17. 22. sij

    If the abundance of the condensates is too large, you can actually inhibit moist convection because its too heavy. This is a mass loading effect, as the “wet air” is heavier than the “dry air”. Ice Giants, with their heavy element enrichment, are a perfect place to explore this.

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  18. 22. sij

    Guillot now reviews how important Uranus and Neptune are for understanding hydrogen atmospheres, starting from the big picture: the wild and alien zoo of exoplanet and Brown Dwarf atmospheres.

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  19. 22. sij

    Looking to exotic hot ices, Marius has verified a 30yr old prediction, getting conduction within superionic ices. Shock compression and X-ray diffraction on compressed ice (lasting nanosecs) produces the crystalline lattice of oxygen: basically solid ices could dominate interior.

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  20. 22. sij

    Marius and colleagues basically have a big and expensive hammer to squeeze things down, give some sense of what’s happening deep in the heart of the giant planets. Not just water, but also SiO2 mixes that could contribute to conductivity/dynamo creation

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  21. 22. sij

    Creates superionic water ice, which is a weird substance with hydrogen acting like a fluid moving through a solid lattice of oxygen atoms. Hard to imagine it still being “ice” when we’re talking about 5000 K!

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