Dr. Jessie Christiansen
@aussiastronomer
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Caltech/IPAC Planet Hunter | Project Scientist NASA Exoplanet Archive | SHERA PI | My views are not the views of NASA | (mostly over at bluesky now) | She/her
Caltech, Pasadena, CA, USA
Joined January 2014
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Pinned Tweet
HAVE YOU TOLD EVERYONE YOU KNOW ABOUT EXPLORE EXOPLANETS: THE DISCOVERERS YET??
Get on it! Here's episode 10 with
@EmDwarf
, which, if I say so myself, is a cracker.
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Holy effing Christ you need to start this with "Julie Andrews, WHO IS STILL ALIVE" because I nearly had a goddamn heart attack.
Julie Andrews, the legendary singer, actress and star of "Mary Poppins," "My Fair Lady" and "The Sound of Music," is writing a memoir that will detail her experiences in Hollywood.
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I have always been interested in galactic archaeology, but I don't think this is what they meant.
Did you know that dinosaurs lived on the other side of the Galaxy?
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@Northernsirena
@KatieRink1
Also, I need everyone (*cough* Boomers *cough*) to understand that if I take a high-res photo of a document with my phone, where every word is legible, THAT COUNTS AS SCANNING. I can even skew it and crop it so it's all right angles and no tablecloth.
BUT NO-ONE HAS A SCANNER.
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My daughter’s ‘scientific proof’ that she loves me more than I love her (an ongoing debate between us) is that my heart is full of other experiences whereas hers is less so, so there’s more room for love for me. I’m actually kind of impressed. 😂😂🥰
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GUYS WAIT WHOA WHOA WHOA.
I did not realise at the time because they published the star under a different name, but WE FOUND A PLANET AROUND 40 ERIDANI A.
*crickets*
THAT'S WHERE SPOCK IS FROM. VULCAN ORBITS 40 ERIDANI A.
WHAT.
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Some people see Jesus in their cheese toast. Astronomers see Jupiter in their tortillas.
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My promise to anyone who does this: "Your ears you keep, so that every shriek of every child shall be yours to cherish—every babe that weeps in fear at your approach, every woman that cries 'Dear God, what is that thing?' will reverberate forever with your perfect ears.”
Sony Pictures Entertainment CEO Tony Vinciquerra says that “very famous people whose names I won’t use” want to redo Norman Lear’s ‘The Princess Bride’
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@MorganMJohnsen
@businessinsider
I actually made a slightly updated version to address some of the critiques of the original (updated the period of rotation of the Galaxy, took out plesiosaurs since THEY'RE NOT ACTUALLY DINOSAURS JESSIE WHAT KIND OF NERD ARE YOU ANYWAY?!)
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Oh no big deal, just ACTUAL PHOTOS OF MOONS BEING BORN AROUND A NEARBY BABY PLANET.
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Someone in here is a $10B space telescope.
And decoy(s).
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WE DID IT! 🥳🍾
@NASAExoArchive
just passed 4000 confirmed exoplanets. There are *4,003* worlds we know about orbiting other stars in our Galaxy. That's 4,003 chances for cyanide skies, lava oceans, magenta sunsets, supersonic cloud streams...
Here's to 4000 more!
#exoplanet4K
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Deep respect for my son's little league team parent.
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My five-year-old daughter, stridently: But what IS energy?
Me, an astrophysicist: ... I ... don't know.
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Okay, here's what I told folks who asked about the detection of phosphine (PH3) in the atmosphere of Venus: If you give me the options of unknown chemistry, unknown geology, or unknown biology, then biology is always going to be a distant third behind the other two options.
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Stop scrolling and look at this TEENY TINY HELICOPTER WE SENT TO MARS.
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What it looks like when a micrometeorite hits your space camera during an exposure.
(Click to see the full image!)
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In case your timeline needs a kitten hug.
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That's... not? What? Those letters? Mean???
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Me: Let the postdoc prepay the hotel from their grant.
Admin: I can book it but then he has to pay and get reimbursed.
Me: Let the postdoc prepay the *$1700* hotel stay from their grant.
Admin: Well if you tell me I have to.
Me: LET THE POSTDOC PREPAY THE HOTEL FROM THE GRANT.
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In case your local astronomer seems agitated, the big dog gravitational wave detector
@LIGO
just detected an ‘unknown or unanticipated’ burst of gravitational waves somewhere deep in space. 👀
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Astronomers, share your most salient lines of code. I’ll start.
import numpy as np
import pandas as pd
from matplotlib import plyplot as plt
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My mum, in Australia: Did you hear about the 48-year-old woman who died after getting the AstraZeneca vaccine?
Me: Yes. Did you hear about the half a million people in the US who died after getting covid?
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Okay someone help me decipher what my daughter is planning to build and whether I should be worried.
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An exciting planet candidate - a cold super-Earth - was announced today by a raft of
#exoplaneteers
including twitterati
@johannateske
,
@astrojennb
, and more, orbiting one of the closest stars to us - a nearby, fast-moving red star called Barnard's star!
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What’s your degree in?
Astrophysics.
Oh! Let me tell you my alien abduction story.
Uhh...
What's your degree in?
Palaeontology.
So you want to build Jurassic Park?
Clever girl.
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Since headlines keep mentioning the
#JWST
price tag, here are other things the US has spent $10 billion on:
- Nine F-35 fighter jets (the US ordered *1,763* last year)
- Two-thirds of the 2020 election ($14.4 billion)
- Ice cream ($6 billion) + lobbying ($4 billion).
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Are you following
@AuschwitzMuseum
yet? It's one of the most important accounts on twitter.
20,000 left to go beyond one million followers of
@AuschwitzMuseum
.
4 days left. It seemed impossible, but it appears that people on Twitter have a different opinion.
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UK: Covid and Brexit
US: Covid and insurrection
Australia: GUYS THERE'S A PIGEON.
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Dr. Makenzie Lystrup getting sworn in as Director of
@NASAGoddard
Space Flight Center using Carl Sagan's 'Pale Blue Dot' is just everything. 😍
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@nkostelic
Me. I was actually wondering whether a silver lining of the pandemic might be that a whole generation of women might come to grips with their silvering hair and we can all just collectively move on from pretending it’s not happening to everyone perfectly naturally!
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I do want to say, having read the paper, I believe the authors did as thorough a job as they were able analysing the data and discussing the possibilities.
Here's the final paragraph of the discussion, since the paper is still inexplicably paywalled.
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This is SOOOOO COOL. It's a movie of Uranus and its moons over four hours, and you can seen some orbital motion of the moons *around* the planet. Why can you see that? Because Uranus is the only planet in the solar system on its side, so its family of moons are tipped towards us!
Last night Uranus reached opposition. We tracked it over 4 hours to make this video showing the movement of the planet and its four brightest moons (Titania, Oberon, Umbriel and Ariel) against the stars.
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Pleeeeeeeeease leave up your summary slide instead of a 'Thank you' slide.
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A memorial to Amelia Earhart in Burbank, where she flew out of for much of her later career.
(Check out the Easter egg in the shadow!)
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What in Kepler’s name is this orbital dynamical catastrophe and does it keep appearing in playgrounds to taunt me specifically.
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Take it from NASA's Exoplanet Archivist:
THERE IS NO PLANET B.
TRUST ME, WE'VE LOOKED.
We have to take care of this one.
#EarthDay2021
#ClimateAction
#EarthDay
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JWST's first star!!!! 😍
(Yes, it's actually just one star.)
(This is what it looks like before we align the 18 mirrors.)
(They're working on aligning things now!)
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Everyone one of us involved in space missions is so heartbroken for
@isro
right now. We've all had those desperate moments of fear, that second of silence when you just don't know. And sometimes that second stretches, and streches... So, so close.
#Chandrayaan2Landing
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JWST launch confirmed for Christmas Eve!
SANTA BETTER GET OUTTA THE WAY.
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I got to chat with the amazing folks
@CriticalRole
about tonight’s
#SuperFlowerBloodMoon
!
#RedMoonRising
TONIGHT! The Super Flower Blood Moon draws near...
Join us in witnessing this cosmic event with planet hunter
@aussiastronomer
as they step into the realm of Exandria to share their TOP 5 TIPS on how to experience it!
#RedMoonRising
Take it away, Dr. Jessie!
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I thought I was actually losing my grip on reality and it turns out that when you set a = b in python, a is not a copy, it's a pointer, so when you edit a, you edit b as well. I had to resort to a truly staggering level of commenting to debug this.
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It’s heeeeeeere.
#SuperFlowerBloodMoon
TONIGHT! The Super Flower Blood Moon draws near...
Join us in witnessing this cosmic event with planet hunter
@aussiastronomer
as they step into the realm of Exandria to share their TOP 5 TIPS on how to experience it!
#RedMoonRising
Take it away, Dr. Jessie!
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I was chatting with someone tonight and they were laughing about all the awfulness happening on Twitter and I tried to explain why I was sad but I don’t think it got through.
Is anyone else sad? It was imperfect but it was something I’d invested a lot of time and care in.
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One woman: I was harassed.
Physics:
Many women: We were harassed.
Physics:
All women: We all know someone who was harassed.
Physics:
@NatureNews
: Sexual harassment is pervasive is pervasive in US physics programmes.
Physics: *Pikachu surprised face*
#WomenInSTEM
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Imagine being a parent showing up at that school and not knowing whether you were picking up your child or not.
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The Iceland volcano looks beautiful at night on the live feed, and is very active right now!
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Guys.
GUYS.
SHE BUILT IT.
Okay someone help me decipher what my daughter is planning to build and whether I should be worried.
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In case you haven’t heard, two (non-functioning) spacecraft have a 1 in 100 chance of colliding over the US tomorrow. 👀 They will pass each other within 15-30 meters. THAT IS SUPER CLOSE. Here I am standing 15 and 30m away. Now imagine me at 1000kg traveling at 15km PER SECOND.
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This is *definitely* the start of a horror movie.
DON'T FREE THE TICK FROM THE AMBER, GUYS.
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Senior male astronomer: *explains recent new type of observation to early career woman in a comment-not-a-question after her talk*
Early career woman: Yes, I was actually the first person to observe that.
Me:
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We have a new exoplanet announcement this morning – no, it’s not phosphine, or aliens!!! :D It’s the first planet found orbiting a white dwarf host star!
Okay what does that mean and why is it cool (literally and figuratively!).
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What Hollywood thinks a professor’s office looks like vs what a professor’s office actually looks like.
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Our son has a high pain threshold. He's that kid who'll walk in with blood everywhere and then be confused by your concern. This afternoon he was distressed for longer than usual by a fall at school, and very droopy, so I took him to urgent care.
He'd fractured his skull.
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Who drives an electric car and what do you have and what do you like and dislike about it? It's time for my old Ford to go to the Giant Junkyard In The Sky and clearly we should go electric for a replacement runabout. 😢🚗☁️
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New idea for an interferometric telescope.
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Hey just throwing it out there but maybe the issue of whether an employer can impose their religious beliefs on your healthcare choices could be solved by, I don’t know, NOT HAVING HEALTHCARE BE TIED TO EMPLOYMENT?!
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We see phosphine in other places in the solar system, and it's not biological. Now, terrestrial planets are not the same as gas giants, for sure! But I think we're a ways away from ruling out chemistry and geology as sources of phosphine.
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ALL DONE GUYS I GAVE A TED TALK AND PEOPLE LAUGHED AND CLAPPED AND I DIDN’T EMBARRASS MYSELF.
#TEDFellow
#TED2022
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I just had the privilege of sitting on the committee that passed Matt’s thesis, so it is veeeeery surreal switching gears from his thesis defense to his Bachelor TV spots. 🤣🤣🤣🤣🤣
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Maybe dwell on the fact that for every recording of a man aggressively over-reacting to pushback from a qualified woman, there are a thousand such incidents that are unrecorded and unremarked, and then dwell on the leaky pipeline for a bit longer still.
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This from the guy who is going to ruin the night sky.
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Saturn and Uranus to scale to compare the size of the ring systems.
(Saturn is still the Queen of the Rings!)
(Planets are so gorgeous I can't believe we're finding new ones every day what a time to be alive. 🥹)
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Our first photo together and our last. Rest in peace my beautiful, feisty, loyal, wonderful Molly-cat. You came into my life when we both needed rescuing, and you made sure everything was ship-shape and in order (and the kittens behaving themselves!) before you left. 🖤🤍🖤🤍🖤💔
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Guys I think the James Webb Space Telescope might actually launch this year. 👀
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GUYS THIS WAS MY GOOD NEWS FROM EARLIER IN THE WEEK.
OUR MISSION GOT SELECTED.
WE'RE GONNA LOOK AT EXOPLANETSSSSSSSS.
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Dinosaurs lived on the other side of the Galaxy.
It is impossible for a squirrel to die from a fall
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ROGUE.
BLACK.
HOLE.
(It's 5000 light years away, so we're okay. But still.)
ROGUE!
BLACK!
HOLE!!
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GUYS I GOT MY OWN SONG AND IT HAS A PLANET PUN. 😍😍😍
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IT HAD TO BE DONE.
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Hoo boy. Thoughts with the ISS crew as they now have retreat from this debris field to safe quarters every 93 minutes, likely caused by a Russian anti-satellite test earlier today (they destroyed their own defunct satellite for funsies and now the debris is endangering the ISS.)
With new data from Kiwi Space Radar gathered at 1620 UTC, we confirm detection of multiple objects near expected location of Cosmos 1408. We will share supporting data as we gather it today.
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Defunding NASA education (and PBS!) could be the start of the end of public knowledge of science and love of NASA.
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This is a cool graphic showing the water content of various solar system bodies - Ganymede!! Who would have thought!! But the BIG surprise for me was Pluto. Whaaaaa?!?
(Credit:
@steve_vance
!)
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So hey you all caught that
#exoplanet
reference in the latest from
@VancityReynolds
and
@MaximumEffort
, right? Kepler-1649c is a real exoplanet discovered earlier this year, and is one of the most Earth-like planets we've found!
#LoveStory2020
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The fractal nature of the crater coverage on the Moon always makes it really hard to gauge how far you are from the surface! I spend the whole descent video like "OH WE'RE ALMOST THERE. WE'RE GONNA HIT IT! Wait... NOW WE'RE CLOSE FOR SURE! ... No? THIS TIME!!!"
YOU GUYS! HERE IT IS!!
Video of the descent and landing of the Chang'e-5 spacecraft, which touched down in the basaltic plains of Oceanus Procellarum on the lunar nearside yesterday.
Look at that landscape! It's craters all the way down!! 😍
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Guys, are you following
@AuschwitzMuseum
yet? Please follow, and RT.
The symbolic goal: 750,000 followers for the 75th anniversary of the liberation of Auschwitz on 27 January 2020.
We can do it, but we need your support here.
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IF WE CAN FIGURE OUT HOW TO LET PEOPLE VOTE FROM SPACE, WE SHOULD BE ABLE TO DO IT FROM THE US AS WELL.
NASA astronaut Kate Rubins votes from space in the US election using the "ISS voting booth"
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They're not receiving a signal from the Chandrayaan-2 lander yet...
#Chandrayaan2Live
*come on lander, come on lander, come on lander*
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I’m an immigrant. I moved here 12 years ago from Australia, to work at *awed whisper* Harvard University. In BOSTON. Which was suddenly a real place, not a movie set! The Red Sox had just won the World Series again and, deprived of cricket, I became a fan. I had two J1 visas.
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Duuuuuuuuude there is going to be SO MUCH GOING ON during the
#FalconHeavy
launch tomorrow. They'll need at least four live camera feeds pointed at everything just to keep track.
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Last weekend:
4yo son: What's that?
Me: It's a manhole cover.
4yo son: Oh.
Me: ...
4yo son: Which one do the girls use?
THIS IS WHY YOU SHOULD USE "CREWED" INSTEAD OF "MANNED". WORDS MATTER.
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Folks, I am useless today. I literally cannot bring myself to care about light curves for one microsecond.
How are you finding productive ways to channel/put aside all this rising panic?
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Long-haul flights: expectation vs. reality.
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Worth a minute and a half of your time.
That time Carl Sagan called out Star Wars for being too white and the audience didn’t know what to do 💀
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This still feels just *wildly* ludicrous and surreal and overwhelming to be able to say but...
*ahem*
In personal news:
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Things amateur astronomers expect you to know: What a Messier marathon is. What a Saros cycle is. How the performance of the latest CMOS compares to CCDs.
Things professional astronomers know: what order they installed their python environments in before they got one to work.
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Children of astronomers:
Me, trying to get my 4-year-old to say ‘cheese’ for a photo while she was looking at the moon: Hey [daughter]! What’s the moon made of?
Daughter: ...rocks?
Me: ...actually that’s right.
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Okay so, exciting announcement - I've been asked to (and agreed to!) lead a new mission concept out of
@NASAJPL
🚀🪐 There's a lot of hurdles between concept and flight so wish us luck!
Part of winning is community support so I guess I'm back on twitter for the next while. 😅🤓
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Okay I've had lots of requests for copies of my DINOSAURS IN SPAAAAAAAAACE animation so I've put it up on my website: enjoy and use at will, it's just for demonstrating a couple facts about astronomy (AND DINOSAURS).
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It’s fairly well localized, so you can bet everyone with a telescope has pointed it at that little patch of sky right now.
(
@d_a_howell
points out that it’s located pretty close to behaving-oddly-of-late superstar Betelgeuse.)
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Just a reminder that we're less than a month out from landing a helicopter on Mars.
A helicopter.
On Mars.
Ingenuity will be the *first aircraft* to attempt controlled flight on another planet.
30 days until I touch down on Mars. See all the ways you can participate and get ready for landing:
#CountdownToMars
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