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Mark Cheung

@markcheung

Father+Helio/astrophysicist: 🌞🌏✨ space weather, magnetic fields in the universe. Aussie; ex NASA SDO now CSIRO; OMO

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Mark Cheung Reposted

A reanalysis of the 1986 Voyager 2 flyby of Uranus shows that it occurred during an extreme compression of the planet’s magnetosphere by the solar wind. This would have had significant effects on the measurements made during the flyby. @spaceJamieJ et al.: nature.com/articles/s4155…

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Congratulations to @damagedonegr on receiving the Alexander Chizhevsky Medal. youtube.com/@e-swan?si=J19… Extremely well deserved for his contributions to studies of long term solar and space climate variability.


Nice! Met Bryan in Tokyo early this year. Could you ask if he has time to visit ATNF too?

I'm happy to announce that the 2024 Hunstead Lecture series will be given by Bryan Scott in November. The series will be dedicated to important topics and skills #datascience in #astronomy, and will include both hands-on tutorials as well as more traditional lectures 💻📡🌌🔭

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Mark Cheung Reposted

Photons, meet the Commissioning Camera 🤝 On October 24, Rubin staff successfully completed the first end-to-end on-sky test of the full telescope system using the testing camera — from capturing the night sky to transferring data to @SLAClab! 🧵 🔗: rubinobservatory.org/news/test-came…

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Mark Cheung Reposted

Coronagraphs allow us to detect and characterise eruptions from the Sun, and are vital for space weather forecasting. Great to see CCOR, a new addition to space-based coronagraphs, working well!

NRL's Compact Coronagraph (CCOR) has successfully collected its first images of CMEs. CMEs are powerful bursts of plasma that can disrupt Earth's magnetic field, leading to disruptions on earth. CCOR can observe and provide real-time data that will help scientists! #NRL #NOAA



Mark Cheung Reposted

And see in real time when NASA's Deep Space Network is communicating with our spacecraft (like right now!) at eyes.nasa.gov/dsn/dsn.html

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Mark Cheung Reposted

🚀LAUNCH UPDATE! NASA’s #EuropaClipper is now targeting NET Monday, Oct. 14 for launch! @NASAKennedy is “all clear” after the storm and teams are moving forward with preparations for the mission to Jupiter’s icy moon Europa. 📲blogs.nasa.gov/europaclipper/

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Mark Cheung Reposted

ARRIVED! We see the shock wave driven by the CME associated with the X1.8 flare on 9 October 2024. The @NWSSWPC prediction is spot on. We should monitor how the solar wind evolves in the coming hours, including the presence of a flux rope and its magnetic field.

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According to an Enlil simulation run by @NWSSWPC, the shock wave driven by the CME associated with the X1.8 flare will arrive around 15:00 UT on 2024/10/10. I think this is a reasonable prediction but that the arrival could also be several hours earlier.



Mark Cheung Reposted

HUGE ERUPTION IN EARTH-STRIKE ZONE, associated with an X1.8 flare. We see a spectacular coronal wave in this movie of AIA images. A nice halo CME followed. My estimate of the speed from LASCO C3 images at 02:30 and 03:06 was~1800 km/s. It may arrive no earlier than midnight UT.


Mark Cheung Reposted

If we see any of these solar wind values at Earth, the incoming solar storm could rival the May 2024 event as the strongest storm of the cycle! Check your local weather forecast for tonight if you want to see the #aurora, this could go down to latitudes like southern Europe /…

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Mark Cheung Reposted

The HUXt model forecast is now out! Looks like the fast, halo CME will hit late tomorrow night/ early morning on 11th. Worth keeping an eye out for aurora 👀🌞💨🌎

That fast halo looks like it could arrive late tomorrow night (though early morning is more likely). Might get clear UK skies, so worth looking north. research.reading.ac.uk/met-spate/huxt…



Mark Cheung Reposted

We took @abc730 into the Australian outback to see our real life time machine. Come along to Inyarrrimanha Ilgari Bundara, the @CSIRO Murchison Radio-astronomy Observatory on Wajarri Yamaji Country, where we’re building the SKA-Low telescope: loom.ly/V_zWvqw

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Mark Cheung Reposted

Oh, this is cool! A mild proton storm driven by a halo CME, with the beautiful comet arcing through the scene! 😍 This CME probably *will* pass over the comet, too. It won't do a whole lot to the dust - maybe a slight ripple. The ion (gas) tail will get a good whack tho!

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Mark Cheung Reposted

BREAKING NEWS The Royal Swedish Academy of Sciences has decided to award the 2024 #NobelPrize in Chemistry with one half to David Baker “for computational protein design” and the other half jointly to Demis Hassabis and John M. Jumper “for protein structure prediction.”

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Mark Cheung Reposted

It always has been a branch of physics.

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I feel like the critique that the physics Nobel is going to computer science misunderstands the culture of physics. They aren’t ceding the prize to cs, they’re claiming it as a branch of physics



Mark Cheung Reposted

BREAKING NEWS The Royal Swedish Academy of Sciences has decided to award the 2024 #NobelPrize in Physics to John J. Hopfield and Geoffrey E. Hinton “for foundational discoveries and inventions that enable machine learning with artificial neural networks.”

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Mark Cheung Reposted

We have a telescope!🤩 Last week, summit staff successfully installed Rubin Observatory's combined primary/tertiary mirror. With all three mirrors & the commissioning camera in place, we officially—for the first time in 15 years of construction—have a complete telescope!🥳 🧵


Congratulations @matthewbailes !

🎉 Congratulations Professor @matthewbailes of @Swinburne and @ARC_OzGRav for receiving the 2024 Prime Minister’s Prize for Science #PMPrizes.



Ongoing debate on X (fmrly Twitter) about X flare classes

Agreed there are uncertainties with predicting an equivalent GOES class with STIX but that means we can’t be confident that the X9 was the biggest of the cycle either. Just a reminder that strong flares can occur on the far side too - plus they think it was an ~X16 in the end



Mark Cheung Reposted

IRIS SJI 1330 from the X9 event on 10/3:


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