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Dr Becky Smethurst
@drbecky_
Astrophysicist researching how supermassive black holes affect galaxies (s/h). I get overly enthusiastic about space on YouTube: youtube.com/drbecky
Science & TechnologyOxford, Englanddrbecky.uk.comJoined March 2009

Dr Becky Smethurst’s Tweets

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I am absolutely thrilled to announce that I’ve been awarded the 2022 RAS Research Fellowship! In my 3 year term I’ll be continuing my work studying the growth of supermassive black holes in the absence of mergers (and the resultant AGN feedback). I can’t wait to get stuck in 💪
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The Royal Astronomical Society is pleased to announce that Dr Rebecca Smethurst has been awarded the 2022 RAS Research Fellowship! Congratulations, @drbecky_ 🌌 ras.ac.uk/news-and-press
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It’s #WorldQuantumDay! Even though I think astrophysics >>> quantum physics 😜 our knowledge of the quantum structure of a hydrogen atom does allow us to work out how much the light from a galaxy has been redshifted & so how far away that galaxy is. I guess I should be grateful!
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MIRI (one of the James Webb Space Telescopes detectors) is now cooled enough to start detecting infrared light! 🥳 another big milestone passed for JWST
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Cool news! Webb’s MIRI instrument recently passed through its critical “pinch point� and cooled to just a few kelvins above absolute zero, which is the coldest you can go: go.nasa.gov/3M6MbeJ Wondering why MIRI is extremely chill? Thread ��
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This image shows the cryocooler for the Webb telescope's Mid-Infrared Instrument, or MIRI. The cryocooler, a silver metallic device, is a special refrigerator to cools MIRI down to less than 7 Kelvin. This photo was taken after the cryocooler had completed testing, and was taken out of the test chamber in preparation for being placed into its shipping container.
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Absolutely love this from the graduate students over on - a "peer review" of all the astronomy April Fools papers published this year. I particularly enjoyed the paper on exoplanets with exomoons which could sustain a werewolf population 😂
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“It could prove this one last piece of this theory of nucleosynthesis—how elements come to be formed in stars… or at what point you start getting planets and the early conditions for life.� - , on #Earendel. ✨🌞🔭
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Congrats on observing the farthest star ever seen! 🔎 We can’t wait to study this star in even more detail with Webb's infrared capabilities — and potentially find even farther stars! go.nasa.gov/3tRj5cP
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RECORD BROKEN: Hubble observed the farthest individual star ever seen! This extraordinary new benchmark detected light from a star that existed within the first billion years after the universe's birth in the big bang. Find out more: go.nasa.gov/3tRj5cP
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The Hubble Space Telescope has spotted the light from an individual star 12.8 billion light years away - thanks to a neat trick of gravity causing the magnification of light! It could be one of the first stars to ever have formed in the Universe 🤯
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For those who aren’t familiar with how academic jobs work, after a PhD, postdoc jobs usually have funding for 2-4 years. My current funding at runs out in September after 4yrs. This RAS research fellowship means I can continue my work for another 3 years 🥳
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My recent work has shown that unlike previously thought, the majority of supermassive black holes grow due to processes internal to a galaxy, but we still don’t understand how that happens yet! So I’m ready and raring to get stuck in and find out how during my RAS fellowship.
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Take thirty seconds and watch Europa and Io serenely sail by, massive Jupiter their background. Imagine seeing this with your own eyes. Envy those who, in the future, will. Animated composite of Cassini images by ; credit: NASA/JPL-Caltech/SSI/CICLOPS/Kevin M. Gill
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What's better than one science nerd getting excited about James Webb's first picture? TWO! (And knows how to make sense of what we're seeing, rather than JUST being an excited kid about it!) 😜🤩
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NASA's new space telescope is in operation- and has captured an image of ancient galaxies over 2,000 light years away! That has got scientists around the world buzzing with excitement. One of them is @drbecky_ and she spoke to @SciNate on the show today.
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CAN'T. STOP. WATCHING. Comparison of JWST resolution (70 mas, 0.00002°) compared to Spitzer (2as, 0.0005°) a space telescope that also viewed the universe in infrared light
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#JWST is looking awesome
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I feel like this is the one moment where yelling "ASTRONOMERS ASSEMBLE" is appropriate. Everyone digging to find out more info about the alignment field
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Here's more info on the @NASAWebb field. Can ID only one galaxy at z=0.285, the rest don't have spectroscopic redshifts. Deepest optical image I can find is Pan-STARRS. The milky way star distance is 1,995 light years from @ESAGaia. I've added some labels for @marinakoren et al.
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It’s just so beautiful. Massive kudos to the teams who built the telescope and developed the techniques and algorithms to perform the phasing & alignment of the mirror. I’ve been blown away on a daily basis by their progress updates over the past weeks.
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Small adjustments, major progress! Having completed 2 more mirror alignment steps, #NASAWebb’s optical performance will be able to meet or exceed its science goals. Now that’s good optics! 😉 go.nasa.gov/3KMV1gW #UnfoldTheUniverse Curious about this image? Thread ⬇�
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An engineering image from Webb which shows a bright star in the foreground with small galaxies and stars in the background. The bright objects in this photo are reddish, a color chosen to optimize visual contrast. Credit: NASA/STScI
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On the NASA live stream, they just said that the resolution achieved with JWST was 0.0000194° (i.e. the smallest thing they can spot spans 0.0000194° of 360° round the sky). 28 TIMES BETTER THAN Spitzer (also an infrared space telescope) which had a resolution of 0.00056°
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This is the same star as seen by the Digitized Sky Survey, just to give you context for the amount of DETAIL the James Webb Space Telescope will give us. It spots much fainter objects and at greater resolution #unfoldtheuniverse [Note this doesn't cover the same field of view]
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OH MY DAYS THERE'S EVEN GALAXIES IN THE BACKGROUND ALREADY �
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Look how far we've come: We started with 18 scattered dots — 18 reflections of the same star, one from each of Webb’s primary mirror segments. These dots were then re-arranged, stacked, and fine-tuned, setting the stage for our first science images this summer! #UnfoldTheUniverse
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GIF showing all engineering progress images of the James Webb Space Telescope as of March 16th. First slide is 18 misaligned stars, then 18 stars in a hexagon, then a single star, then a single focused star with galaxies and stars in the background.
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This is the crossover I never knew I needed 😂
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🎶Four thousand, nine hundred and forty planets🎶 4940 planets so far How do you discover, discover a world? In transits, in wobbles, in tiny pixels With gravity and science and lots of math!🎶 go.nasa.gov/3IfP1vB
An animation showing a planet moving across the face of its star and the resulting dip in the star's brightness.
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LATEST IMAGERy?! �
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📺 Watch our virtual media briefing at noon EDT (16:00 UTC) on March 16th on nasa.gov/live to see a progress update on Webb’s mirror alignment! Experts will discuss the latest imagery. Use #UnfoldTheUniverse to ask questions. Media RSVP info: nasa.gov/press-release/
An image of Webb at Northrop Grumman. The golden mirror has its wings folded back into launch configuration. Image credit: NASA/Chris Gunn
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We’re doing galaxies next week on the Supermassive Podcast! One of my specialities too, so I’m very excited 😅 drop your questions in reply to this tweet by the and I might answer them in the next episode!
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Curious about galaxies? Have you ever wondered how they form, and how they get their fascinating structures? Reply to this tweet with your questions and the #RASSupermassive team might answer them in the next episode! 🌌
Image of a galaxy in space overlaid with the RAS Supermassive logo and text reading "Send us your questions"
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Did you know you can get amazing photos of the stars with just your phone? I took this one on Sunday morning of the 🌙 and the Milky Way with my iPhone 13 In my latest 🎥 I’ve got 3 tips for how to to do this for beginner astrophotographers👇 youtu.be/ToN15U6dy1Q
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A superhero who bases their aesthetic on my beloved Toenail Moon? 🌙 I’m there!
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See the all-new Big Game TV Spot for Marvel Studios’ @MoonKnight 🌙, an Original series streaming March 30, only on @DisneyPlus.
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I JUST filmed my Night Sky News video for next week in the past hour and meanwhile NASA GOES AND DROPS THIS! First photons of light detected by the James Webb Space Telescope (currently a bit cross eyed, without its mirrors aligned so there’s 18 dots where there should be one)
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⚫� Our team first chose a bright, isolated star called HD 84406. Over ~25 hours, Webb was repointed to 156 positions around the star's predicted location, generating 1560 images with NIRCam’s 10 detectors. This is just the center of an image mosaic with over 2 billion pixels!
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The James Webb Space Telescope's initial alignment mosaic, seen as 18 blurry dots of starlight against a black background
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