Tweets from the Institute of Space and Astronautical Science (ISAS) located in the JAXA Sagamihara campus. 日本語：@ISAS_JAXA
Joined January 2021
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[Research] Discovery of Hidden Magnetic Structures in the Quiet Sun from the Sunrise-III Balloon Mission
Read more 🔗: isas.jaxa.jp/en/topics/00442…
JAXA Institute of Space and Astronautical Science retweeted
📢 The AO2026 selection results are now available!
🔹 18 research proposals from 7 countries
🔹 13 proposals selected
🔹 34 samples allocated for new research
Sample distribution to the selected research teams will begin soon.
🔗 Details:curation.isas.jaxa.jp/en/top…
As #Hera closes in on its destination, it will investigate the many mysteries left by #DART’s impact on Dimorphos. Why was the deflection so large? Where did all the dust come from? We also look forward to new insights from JAXA’s thermal infrared imager #TIRI. 🛰️
ESA's Hera spacecraft is nearing its destination; here are🔟asteroid mysteries that Hera will explore, including...
🤔Why was asteroid Dimorphos so strongly deflected by NASA's DART impact?
🤔Where did all its dust come from?
🤔What lies beneath its surface?
😲(#5 may surprise you!)
esa.int/ESA_Multimedia/Video…
#Hera is nearing the Didymos-Dimorphos binary asteroid system and is expected to arrive around 4 November (JST) After the #DART impact, it will study the asteroids’ shapes, masses, rotations, and orbital dynamics. We look forward to more discoveries! 🚀✨
hera.isas.jaxa.jp/wp-hera/en…
【今後の観測・運用計画】Hera探査機は、11月4日(JST)頃の到着を目指して二重小惑星系に接近中です🛰️🪨到着後は、DART衝突後の小惑星の形状・質量・自転公転運動などを詳しく観測します。今後の観測・運用計画の詳細はコチラ💫
hera.isas.jaxa.jp/wp-hera/48…
Congratulations to @NASAJPL on 90 years! 🎉 JPL is a valued ISAS/JAXA partner, alongside us from navigation and communications support for Hayabusa and Hayabusa2 to DSN support for #MMX. We look forward to many more discoveries ahead! 🚀✨
Become a dragonfly?! 🤩 Send your name to Titan, the largest moon of Saturn 🪐, to travel upon NASA's Dragonfly mission, for which JAXA/ISAS is contributing a seismometer! You can download a digital boarding pass for your journey 🖋️ go.nasa.gov/dragonfly-names
Your next trip: a flight to another world. 🪐
Send your name aboard NASA’s Dragonfly mission to Saturn’s largest moon Titan and get a personalized boarding pass for the journey.
Become a Dragonflyer today: go.nasa.gov/dragonfly-names
ALT Poster with a peach-and-gold background that reads “Journey to Titan” in bold orange text, with a banner beneath it that says “Fly your name to another world!” Below the headline, NASA’s Dragonfly rotorcraft flies through a hazy sky with its rotors spinning, with faint hexagon patterns in the background.
#Dragonfly, a rotorcraft mission to explore Saturn’s moon Titan, successfully completed a flight simulation! The mission demonstrated autonomous landing-site selection and touchdown. ISAS/JAXA is providing a seismometer to explore #Titan’s interior 👀.
NASA’s Dragonfly mission successfully completed its most comprehensive flight simulation yet at @JHUAPL, testing its ability to autonomously navigate and land safely on Saturn's moon Titan. 🚁
Learn more: go.nasa.gov/4kkHIJy
ALT A technician in a white cleanroom suit, hood, face mask, glasses, and gloves uses a tool to install one of Dragonfly’s two navigation cameras. The camera is a small gold-and-silver box mounted on spacecraft hardware, with cables wrapped in shiny protective plastic running overhead.
On the front line of planetary defense. #Hera has captured its first separate views of asteroids Didymos and Dimorphos! Detailed images of Dimorphos are set to be released on Nov. 25. JAXA's #TIRI thermal infrared camera is onboard to also studying the effects of the DART impact
Our Hera spacecraft can now see Didymos and Dimorphos as two separate asteroids!
Coming closer, it will study the effects of NASA's 2022 DART impact and help advance asteroid deflection as a planetary defence technique.
The first detailed images of Dimorphos are expected on 25 November.
Follow Hera’s journey with the Hera Space Companion 👉 hera.esa.int
🔗esa.int/Space_Safety/Hera/Fi…
ALT Hera's first view of the separate Didymos and Dimorphos asteroids
Hera will study NASA’s 2022 DART impact and advance asteroid deflection as a planetary defence technique. 🦕 The first detailed images of Dimorphos are expected on 25 November. ✨ Follow Hera’s journey with the Hera Space Companion! ‼️🛰️ hera.esa.int
Hera探査機は、NASAの2022年のDART衝突実験の影響を調査し、プラネタリーディフェンス技術としての小惑星軌道変更技術の発展に貢献する予定です🦕
Dimorphosの最初の詳細な画像は、11月25日に公開される予定です✨
Hera Space Companionで、Heraの旅路を見守りましょう‼️🛰️
hera.esa.int/
Hera’s 2nd deceleration manoeuvre was a success, reducing its relative speed by 70 m/s at a distance of 2,300 km from the asteroid Didymos‼️ Hera is travelling at a speed of 20 m/s with respect to the asteroid. After a small manoeuvre next week, this should approach zero! 🛰️🪨
Thank you, Ambassador Kazuhiro Suzuki, for sharing the successful #MMX launch! 🚀 Following the successful #MMXLIFTOFF, MMX is on its way to Phobos and will return samples to South Australia in 2031. We look forward to further Japan-Australia space cooperation!
Thank you, Ambassador Suzuki, Ambassador of Japan to France, for highlighting the successful #MMXLIFTOFF! 🚀 France contributes the MIRS near-infrared spectrometer & the French-German rover IDEFIX to the mission 🦾. Together, we will journey to Phobos & work toward sample return!
We were pleased to welcome Dr. Anke Pagels-Kerp and the @DLR_en delegation to ISAS. We introduced #MMX, #DESTINY⁺, and #XRISM, reflected on our successful Japan-Germany partnership through Hayabusa2, and discussed future cooperation in space science and exploration.
ALT A group photograph in front of a half-sized model of the MMX spacecraft.
The final countdown! 🎶 #RomanSpaceTelescope is on the final checks before science begins! Japan contributes coronagraph optical components, data reception at our Misasa station, and coordinated observations with the Subaru Telescope & PRIME. We can’t wait for the first images!🔭
It's the final countdown 🎶
We're one step closer to Roman's first images! The observatory is now fully functional and the team is performing their final checks and calibrations before starting science observations.
go.nasa.gov/4A9menV
Thank you, @esascience, for sharing #MMXLIFTOFF and supporting the #MMX mission! 🚀 Together, Japan and Europe will explore Phobos and Deimos, return samples from Phobos, and help uncover the origins and evolution of our Solar System.
Next stop: Phobos & Deimos 🌑
MMX has successfully launched from Tanegashima, Japan. Its mission is to observe Mars’s mysterious moons, collect a sample from Phobos's surface and return it to Earth.
👉 esa.int/ESA_Multimedia/Image…
@JAXA_en @NASA @CNES DLR @ESA
Thank you, @NARIT_Thailand, for cheering on #MMX during #MMXLIFTOFF 🚀 Our journey to explore Mars’s moons and return samples from Phobos to Earth in 2031 has begun. We look forward to sharing this adventure with the people of Thailand.
Thank you, @NASASolarSystem, for highlighting the mysteries of Phobos and Deimos! 🚀 With NASA's MEGANE and P-Sampler aboard #MMX, we aim to uncover the origins of Mars’s moons and return samples from Phobos with our amazing international partnership. #MMXLIFTOFF
NASA has been studying Phobos and Deimos at Mars for decades.
See what we've discovered so far, and learn about the many mysteries that remain: science.nasa.gov/mars/facts/…
Thank you, @CNES and @CiteEspace, for sharing the excitement of #MMXLIFTOFF! 🚀 Together with IDEFIX, the rover jointly developed by CNES and DLR, #MMX is heading to Phobos to explore the origin of Mars’s moons, made possible through such great international cooperation.
🚀🔴 Dans les coulisses du lancement de #MMX à la @CiteEspace
#Cnes #MMX @DLR_SpaceAgency @DLR_en @DLR_de @mmx_jaxa_jp @JAXA_en @JAXA_jp @jaxa @LiraAstro
Thank you, @AschbacherJosef, for celebrating the #MMX launch! 🚀 With support from @esa's deep-space communications network, Estrack, #MMX is aiming to return samples from Phobos. We look forward to continuing Japan-Europe cooperation in Solar System exploration. #MMXLIFTOFF
Congratulations to @JAXA_en and the entire #MMX team on a successful launch!
Exploring farther means working together. @ESA is proud to contribute our deep-space communications, Estrack network and European scientific expertise to this ambitious journey to Phobos🌑
Together, from the Moon to Mars and beyond.