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Posts by David S. F. Portree

A grayscale aerial view of a rugged terrain featuring multiple impact craters and steep ridges.

A grayscale aerial view of a rugged terrain featuring multiple impact craters and steep ridges.

HiPOD: South of Ares Vallis

From HiWish: “The objective of this observation is to help us understand the flow that occurred between smaller rivers and larger rivers, and how it affected the landscape.”

https://uahirise.org/hipod/ESP_076896_1890
NASA/JPL-Caltech/University of Arizona
#Mars #NASA

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A family of Ravens is putting the goth back in gothic at NYC's largest cathedral--St John the Divine. There are five mouths to feed, so the parents are staying busy! ⛪️⛪️⛪️ #Ravens #Cathedral #birding

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Exoplanet system discovered with help of Antarctic telescope - University of Birmingham Researchers discover planetary system evolving in real time - thanks to a one-of-a-kind telescope located in the Antarctic Plateau.

University of Birmingham: Oddball Exoplanet System Discovered with Help of Antarctic Telescope www.birmingham.ac.uk/news/2026/od...

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After my wife's death in a car crash in 2007, I became dad and mom for our four-year-old, who was critically injured in the crash. My whole world was turned upside-down, but the thought of being the best dad I could held me together. Now I see her success and happiness as my greatest accomplishment.

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Star-Raker (1978) The story of spaceflight told through missions and programs that did not happen - that is, the great majority of them.

In keeping with my recent theme of space shuttle stuff that didn't happen, here's Star-Raker.

It was proposed in the 1960s as a candidate NASA Space Shuttle design, then resurfaced in the 1970s as part of plans to build giant Solar Power Satellites.

spaceflighthistory.blogspot.com/2020/09/star...

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John Young, #Apollo16, April 21, 1972

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John Young at Station 1 close to the rim of Plum Crater
#Apollo16 EVA 1
April 21, 1972

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I feel the need ... the need for speed!

John Young took the lunar rover for a spin in the famous #Apollo16 'Grand Prix on the Moon' at the record speed of 11 mph, April 21, 1972.

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April 21, 1972 the #Apollo16 LM commanded by John Young and piloted by Charlie Duke, landed on the Moon They spent 71 hours on the lunar surface, during which they collected 95.8 kg of samples, including Big Muley, the largest Moon rock collected by Apollo
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54 years ago April 21, 1972, #Apollo16's John Young took the lunar rover for a spin in the famous 'Grand Prix on the Moon' at the record speed of 11 mph.
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Four frame color mosaic of southern Lunae Planum and eastern Valles Marineris, imaged by Viking Orbiter 1. This image is constructed from four pairs of violet and red images. 

This image was taken during on April 11, 1978, during Viking Orbiter 1's 663rd revolution around Mars. 

Image Credit: NASA / JPL / USGS / Justin Cowart

Four frame color mosaic of southern Lunae Planum and eastern Valles Marineris, imaged by Viking Orbiter 1. This image is constructed from four pairs of violet and red images. This image was taken during on April 11, 1978, during Viking Orbiter 1's 663rd revolution around Mars. Image Credit: NASA / JPL / USGS / Justin Cowart

Lunae Planum - Viking Orbiter 1 - From Aster Cowart (terrasabaea.bsky.social) - https://flic.kr/p/21Nzufq

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The 13.3% waxing crescent and Orion Nebula on Monday evening.

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BBC Radio 3 - Through the Night, Symphonic Fairy Tales from Switzerland The St. Gallen Symphony Orchestra performs Rimsky-Korsakov's Scheherazade suite.

🔊 #NowPlaying on #BBCRadio3:

#ThroughTheNight
- Symphonic Fairy Tales from Switzerland

The St. Gallen Symphony Orchestra performs Rimsky-Korsakov's Scheherazade suite.


▶️ Relisten on BBCSounds

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84 NASA missions at risk under new proposal Proposed NASA cuts would reduce NASA’s workforce by thousands and cancel over 50 space missions.

#JournoRequest I am working on a story for @iflscience.com on the NASA cuts in Trump's budget proposal 🔭🧪

Is your mission directly affected, or will your research be affected if a mission is ended or cancelled? I want to hear from you; we will keep you anonymous.

DM me or signal: DrCarpineti.59

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Dream Chaser actually looks a lot like an old Soviet design to me. But I agree, I'd like to see at least one of these shuttle designs in operation.

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Fan catch of the year?!

This guy caught a foul ball while holding a baby 🤯

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Fascinating history, though - full of lessons for building our future

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Two hooded figures with lamps approach a moonlit, isolated cottage.
A woman answers the door.
We have come for the child, says the hooded figure
So soon? she asks
It is time, says the hooded figure.
The woman is distraught. We should never have got him a library card!
What is done cannot be undone, says the hooded figure
We couldn’t see the harm! We just wanted him to enjoy reading! 
For most, it ends there, says the hooded figure, turning away and walking into the wilderness
Oh lord, What have I done! says the woman,
the child walks past her and out into the darkness with them.
Do not cry mother. 
I am a writer now.

Two hooded figures with lamps approach a moonlit, isolated cottage. A woman answers the door. We have come for the child, says the hooded figure So soon? she asks It is time, says the hooded figure. The woman is distraught. We should never have got him a library card! What is done cannot be undone, says the hooded figure We couldn’t see the harm! We just wanted him to enjoy reading! For most, it ends there, says the hooded figure, turning away and walking into the wilderness Oh lord, What have I done! says the woman, the child walks past her and out into the darkness with them. Do not cry mother. I am a writer now.

my latest books cartoon for @theguardian.com

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3D image shows a close-up of very blocky and fractured material at the bottom of an impact crater on Mars.

3D image shows a close-up of very blocky and fractured material at the bottom of an impact crater on Mars.

HiRISE 3D: Fractured Floor Materials within a Crater in Arabia Terra

This anaglyph shows an interesting pattern of fractures. It may be incipient chaos formation. A digital terrain model can help to figure out what's going on.

www.uahirise.org/anaglyph/ESP_035843_2165...

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Not sure if this is a joke or not. I could see someone like Isaacman actually saying that.

Test it on the Moon, sure - and if it doesn't work, what then?

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Enhanced color image shows a close-up of extensive, large dunes in the north polar region of Mars. There is seasonal, bright ice on the slipface of many of the dunes, and dark patches between the dunes as well.

Enhanced color image shows a close-up of extensive, large dunes in the north polar region of Mars. There is seasonal, bright ice on the slipface of many of the dunes, and dark patches between the dunes as well.

HiPOD: Translucent Ice on Dunes

At the time of year we took the image, the whole scene was probably covered in carbon dioxide ice. Some of this ice is translucent, so you can see the dark dunes through it.

https://uahirise.org/hipod/ESP_076844_2550
NASA/JPL-Caltech/University of Arizona
#Mars

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So much is coming home to roost in the US space program - NASA space suit development has been underfunded since the 1970s.

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Kelly, Gallego urge DHS to halt planned ICE detention facilities in Surprise and Marana | Arizona Mirror Mark Kelly and Ruben Gallego are urging DHS to halt planned ICE detention facilities in Arizona's Surprise and Marana amid concerns

"Arizona U.S. Sens. Mark Kelly and Ruben Gallego are urging the Trump administration to put a halt to two planned detention facilities in the state as opposition to them grows and questions continue to mount...

"The two Senators have requested a response by May 1.

azmirror.com/briefs/kelly...

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With the help of the Sandy Hook families, The Onion has reached a long-awaited deal to take over InfoWars.

We've enlisted the help of @timheidecker.bsky.social, who will be InfoWars' Creative Director.

Please stand by for more.

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Every Sunday my paying Patreon Patrons get access to the Sunday Space Brochure, a scan of a NASA, other space agency, or contractor public info brochure from my collection, which spans nearly 70 years.

This one, from 1991, looks at Europe's proposed Hermes space shuttle.

www.patreon.com/u168347

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remembering at all times of course that it is not an actual 'person'

I mean it's a running machine, it's good at one thing only and it doesn't dream

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On this day, April 20, 1972, following an 7 hour engine crisis that almost halted the mission completely, #Apollo16 astronauts Charles M. Duke Jr., lunar module pilot, and John W. Young, commander, landed on the lunar surface.
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April 20, 1972, #Apollo16 Lunar Module touches down in the Descartes lunar highlands region What followed was 71 hours on the surface and 3 incredible EVAs.
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#Apollo16 lunar module "Orion" touches down in the Moon's Descartes Highlands, about 230 meters northwest of the planned target area. April 20, 1972. contactlight.de
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#ThisDayInHistory April 20, 1972 #Apollo16 landed on the #Moon, in the Descartes Highlands.

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