Mike Malaska

@mike_malaska@deepspace.social
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Planetary scientist, organic chemist, astrobiologist, field scientist. Works at JPL. Champion of Titan exploration. Fascinated by life in Deep Ice. Studies the mysterious labyrinths and dissolution geology (karst) on Titan. Opinions expressed are my own. He/Him.

#PlanetaryScience
#astrobiology
#chemistry
#geomorphology
#geology
#karst
#cryosphere
#OceanWorlds
#DeepIce
#PlanetaryCaves

New Science Insider news article out in Science Magazine about NISAR (NASA-ISRO SAR) satellite launching soon. Includes a quote from me and other scientists.
#NASA #ISRO #NISAR #NASAJPL
https://www.science.org/content/article/giant-radar-satellite-set-probe-earth-s-shifts-and-shudders

Anyway. When you see people hyperventilating that "B-b-but paying farm workers more would make food unaffordable!" please correct them up for me.

They might mean well? They might be trying to make a point about how much we owe the humble farm worker?

But that kind of talk is exactly how you get people believing "Gosh shucks golly. I guess we just need slavery to live."

Cut it out already.

Muscadine vineyard with a thunderhead in the distance. Orange County, North Carolina.

#SilentSunday

From my upcoming book.

"Fluvial Geomorphology of my Gravel Driveway."

(Just kidding on that one.)

And here is a closeup image where you can the definite size difference where the overflow stream entered. The area to image above and left of the field notebook was overwashed.

It is subtle. But you can also see a little bit of scour in the area where the overwash occured.

Where did the smaller gravels go? Thats a great question, and its too squishy to poke around and look right now. It could be under a mudpatch now on the driveway, it could be in the lawn or maybe even washed into the woods.

Tropical Storm Chantal provided just a terrific opportunity to see #geology in action.

Here is our gravel driveway, sloping from right to left. At image center, an overflowing came onto the driveway from the woods.

Right at the field notebook location, you can see where the smaller gravels in the driveway to the left have been mobilized away by the incoming stream. [1/2]

#ANSTO are looking to employ an ongoing climate research scientist. Rare opportunity to join a good group :)

https://careers.ansto.gov.au/job/Sydney-Research-Scientist-Climate-Science-NSW/1212088266/

#FediJobs #FediHired #Climate

Research Scientist - Climate Science

Research Scientist - Climate Science

Scientists Just Debunked 'Earth's Oldest Impact Crater'

Ever been late because you misread a clock? Sometimes, the "clocks" geologists use to date events can also be misread.

ScienceAlert

Where might the climate in your city be headed in an extreme future scenario? Explore at https://www.climatecentral.org/graphic/shifting-cities-2025?graphicSet=Shifting+U.S.+Cities

"Summers have been heating up for decades and they’ll only get hotter"

More background on this new project from Climate Central at https://www.climatecentral.org/climate-matters/shifting-cities-2025

3I/ATLAS also seems like it could be somewhat older than 1I and 2I were. It's pretty incredible to think of this new-seen tiny world as wandering our Galaxy for upwards of 8 billion years.
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3I/ATLAS also seems like it could be somewhat older than 1I and 2I were. It's pretty incredible to think of this new-seen tiny world as wandering our Galaxy for upwards of 8 billion years.
So no, we're not going to be able to trace 3I/ATLAS back to any home star. And based on how it is moving, that star or star cluster was a different one to either of the origin stars of *both* 1I or 2I. We just have to work with the memories that 3I brings with it.
That thick-disk origin means 3I/ATLAS is infalling from a more southerly direction than most of the interstellar objects that the Ōtautahi–Oxford model suggests, which come in from the North. This makes its orbit one that would be pretty unusual for @vrubinobs.bsky.social to see, for instance!
From the Ōtautahi–Oxford model, 3I/ATLAS is our first interstellar object from the Galaxy's thick disk. It'll be exciting to see what the current and upcoming observations can help tell us about our new visitor over the next few months. /fin

From a Different Star: 3I/ATLA...
From a Different Star: 3I/ATLAS in the context of the Ōtautahi-Oxford interstellar object population model

The discovery of the third interstellar object (ISO), 3I/ATLAS (`3I'), provides a rare chance to directly observe a small body from another Solar System. Studying its chemistry and dynamics will add to our understanding of how the processes of planetesimal formation and evolution happen across the Milky Way's disk, and how such objects respond to the Milky Way's potential. In this Letter, we present a first assessment of 3I in the context of the Ōtautahi-Oxford model, which uses data from Gaia in conjunction with models of protoplanetary disk chemistry and Galactic dynamics to predict the properties of the ISO population. The model shows that both the velocity and radiant of 3I are within the expected range. Its velocity suggests an origin within the Milky Way's thick disk, making it the first ISO from this population, and predicts a high water mass fraction, which may become observable shortly. We also conclude that it is very unlikely that 3I shares an origin with either of the previous two interstellar object detections.

arXiv.org