I thought the crowd at Springsteen last week was as old as I was going to see. Then tonight we are at the Ukulele Orchestra of Great Britain...

Roadrunner appears to be pacing the snake (they eat baby rattlers) but I think this one is too big for him.

Thank you for this, it was very helpful as I could not attend.

Review summary from @arizonaagenda.bsky.social

Book cover for “Murder in the Fourth Estate” by Jeremy Duda. Also summary of the conclusion that Kemper Marley was not involved.

New book coming out concludes my relative Kemper Marley was not involved in murder of reporter Don Bolles 50 years ago. I was on the U of A campus for high school debate the day the giant headlines screamed “Marley Ordered Bolles Killing”. Kind of thing you remember.

We had a great meeting.

Empty stage ahead of Springsteen performance.

In Phoenix to meet with the Boss. Not the Dean

🔭🧪

In addition to what Casey reports, this is happening as NASA has ended support of the community groups that have given formal and informal feedback to the agency for decades, and the process by which the space science community identifies NASA and NSF's scientific priorities is threatened.

Grizzly bears catching salmon jumping upstream with labels on the bears of atmospheric molecules.

Atmospheric structure T(P) plot showing conceptually photons escaping fro the atmosphere compared to a photo of salmon jumping upstream.

I did, however, show my "bears eating photons" slide.

I’m having a wonderful visit to CfA where I gave a talk yesterday. It’s funny that when I meet people they invariably say “oh you are the guy who posts wildlife”. Maybe should have shown a watering hole slide deck instead of brown dwarfs & exoplanets.

The HiRISE team notes the passing of two esteemed friends and colleagues: Deputy Principal Investigator emerita Candice Hansen-Koharcheck and Co-Investigator Paul Geissler.

More about Candice: www.psi.edu/staff/profil...

More about Paul: www.legacy.com/us/obituarie...

So sad to hear of Candy’s passing. Indeed a giant of planetary science.

Giving my first all new colloquium length talk on Tuesday after 5 years of Director-ing and I have to say it's a lot of work putting a talk together (who knew?) but fun exercising some atrophied science muscles. Even had an original (maybe) science idea.

WiFi camera screenshot showing javelina with message that with the app you can “see their names”.

Ring AI says it can identify javelina by name. Impressive if true.

I have to admit that before this mission I was a little jaded at what this would accomplish. Seeing the amazing crew and the desire for inspiration they touched—especially among young people—has been such a refreshing rejuvenator.

4x4” mini painting of Earthset

good bye, Moon

Remembering LPL alum Betty Pierazzo.

NASA's Barbara Cohen created this image of the Moon's Pierazzo crater, named after our late PSI colleague Betty Pierazzo. Betty was an expert in impact modeling and the astrobiological and environmental effects of impacts. She also passionately supported students and other teachers.

The FY 2027 NASA budget request hides its science cuts by omitting mission names instead of explicitly zeroing them out.

We did the work and found 54 missions cancelled in this proposal.

This is another extinction-level event for NASA science.

Full list: planetary.org/save-nasa-science

You can see why the exo-zodiacal light becomes an issue in imaging exo-Earths. Imagine turning this background glow around another star up by say 10x and the pale blue dot getting lost in the glare.

The foreground is dominated by the dark, heavily cratered lunar surface. In the distance, a crescent Earth, setting. Behind, the black of deep space.

I can't stop staring at these photos.

This is what Earthset looks like—our homeworld setting behind the Moon.

And compare the dark, cratered surface of the Moon to the blue oceans and swirling clouds on our own planet.

If there's a starker illustration of our lifegiving world, I've yet to see it.

bsky.app/profile/caro...

lpl.arizona.edu/about/histor...

When we projected images on that globe, we could walk around to the side and see these structures in ways that people had really never seen before. We discovered that, particularly, there was a big, beautiful bulls-eye structure, multi-ring basin that turned out to be an impact structure—huge, a thousand kilometers across, on the east limb of the Moon. It’s called the Orientale Basin. Looking at that made it obvious that a lot of the other basins, like the Imbrium basin and Nectaris and so forth, were the same class of multi-ring bulls-eye structures. We could trace these rings.

As we see Orientale face on check out this remembrance from William Hartmann on recognizing the multi-ring structure from his work rectifying ground based images of the moon.

Easter dinner was not cooperative.

Faith and the Future of Creation - Lausanne Movement Katharine Hayhoe explores the intersection of faith and environmental stewardship, highlighting the biblical call for Christians to care for God’s creation. Drawing from her background as both a scien...

As a Christian, Easter reminds me that life is a gift, and we’re called to care for it.

Right now, climate change is putting that gift at risk for people and nature around the world.

That's why I see climate action as an act of love: for all our global neighbours and the home we share. 💚

Yes, I already shared this. Yes, I am unashamedly sharing it again. This image means so much to me personally as a #WomenInSTEM and space scientist 🔭🧪 🌗🪐🌎. Christina Koch once worked at GSFC, where I now work, and was at APL, where I worked before, when selected as an Astronaut!

Lol

After getting texted another cut of daughter’s wedding video I told her there were more versions than Blade Runner. Was not well received.

Here's another version, combining the two different exposures made in quick succession. One much darker exposure made the bright limb stand out more from the rest, the widely circulated longer exposure brought out the dim light details. Combining the two images helps to restore the brightness range.