Starship Asterisk*

[quote="APOD Robot" post_id=342212 time=1731215191 user_id=128559]
[url=https://apod.nasa.gov/apod/ap241110.html] [img]https://apod.nasa.gov/apod/calendar/S_241110.jpg[/img] [size=150]Valles Marineris: The Grand Canyon of Mars[/size][/url]

[b] Explanation: [/b] The largest canyon in the [url=https://science.nasa.gov/solar-system/]Solar System[/url] cuts a wide swath across the face of [url=https://science.nasa.gov/mars/]Mars[/url]. Named [url=https://youtu.be/JUbQM47QXwQ]Valles Marineris[/url], the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep [url=https://slopeball.org]slope ball[/url]. By comparison, the [url=https://en.wikipedia.org/wiki/Grand_Canyon]Earth's Grand Canyon[/url] in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the [url=https://en.wikipedia.org/wiki/Valles_Marineris]Valles Marineris[/url] remains [url=https://vignette1.wikia.nocookie.net/theevilliouschronicles/images/8/85/Confused-cat.jpg]unknown[/url], although a leading hypothesis holds that it started as a [url=https://apod.nasa.gov/apod/ap980310.html]crack[/url] billions of years ago as the planet cooled. Several geologic processes have been identified in [url=https://science.nasa.gov/resource/valles-marineris-the-grand-canyon-of-mars/]the canyon[/url]. The [url=http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-mars.html]featured mosaic[/url] was [url=http://nssdc.gsfc.nasa.gov/photo_gallery/caption/marsglobe1.txt]created[/url] from over 100 images of [url=https://science.nasa.gov/mars/facts/]Mars[/url] taken by [url=https://science.nasa.gov/mission/viking/spacecraft-and-science/]Viking[/url] Orbiters in the 1970s.


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[/quote]

The APOD image for November 10, 2024, showcases Valles Marineris, the largest canyon in the Solar System, located on Mars. Spanning over 3,000 kilometers in length, up to 600 kilometers in width, and plunging to depths of 8 kilometers, it dwarfs Earth's Grand Canyon, which is 800 kilometers long, 30 kilometers wide, and 1.8 kilometers deep.

[quote="APOD Robot" post_id=342212 time=1731215191 user_id=128559]
[url=https://apod.nasa.gov/apod/ap241110.html] [img]https://apod.nasa.gov/apod/calendar/S_241110.jpg[/img] [size=150]Valles Marineris: The Grand Canyon of Mars[/size][/url]

[b] Explanation: [/b] The largest canyon in the [url=https://science.nasa.gov/solar-system/]Solar System[/url] [/quote]

The largest [b][i]known[/i][/b] canyon in the System.

The four rather large, gassy planets that make up most of the System that isn't the Sun could have solid cores with canyons larger then Mariner Valley. It is unlikely that we'll ever know.

I have a wallpaper-changer program on my PC. On 11/11/2024, it decided to pop this inage up as my background. I'm quite fond of it. It's about as close to Mars as I'll ever get.

[quote="Jim Armstrong" post_id=342221 time=1731260974]Delves?[/quote]

Makes sense to me. "Delves" as in digs, which is appropriate since it is STILL being dug or carved by running water!

[b][url=https://www.etymonline.com/search?q=delve]delve [/url](v.)[/b]
Middle English delven, from Old English delfan "to dig, turn up with a spade or other tool, excavate" (class III strong verb; past tense dealf, past participle dolfen), common West Germanic (cognates: Old Saxon delban, Dutch delven, Middle High German telben "to dig"). This is perhaps from a PIE root *dhelbh- (source also of Lithuanian delba "crowbar," Russian dolbit', Czech dlabati, Polish dłubać "to chisel;" Russian dolotó, Czech dlato, Polish dłuto "chisel").

Weak inflections emerged 14c.-16c. Figurative sense of "carry on laborious or continued research" is from mid-15c. Related: Delved; delving; delver.

Delves?

[quote="Eclectic Man" post_id=342218 time=1731251447 user_id=129639]
Just a note to say that the Copper Canyon in Mexico is somewhat larger than the 'Grand Canyon' in Arizona, USA:

"The combined length of the ravines makes Mexico’s Copper Canyon a whopping four times larger than the Grand Canyon in the United States. In some places, it’s even deeper than the Grand Canyon, with a depth of over 1 mile (1.6 km)!"
[/quote]

I had never heard of Copper Canyon. Thank you for enlightening me!

Just a note to say that the Copper Canyon in Mexico is somewhat larger than the 'Grand Canyon' in Arizona, USA:

"The combined length of the ravines makes Mexico’s Copper Canyon a whopping four times larger than the Grand Canyon in the United States. In some places, it’s even deeper than the Grand Canyon, with a depth of over 1 mile (1.6 km)!"

https://visitcoppercanyon.com/facts-about-mexico-copper-canyon/#:~:text=Mexico's%20Copper%20Canyon%20is%20much%20bigger%20than%20you%20think&text=The%20combined%20length%20of%20the,1%20mile%20(1.6%20km)!

[url=https://apod.nasa.gov/apod/ap241110.html] [img]https://apod.nasa.gov/apod/calendar/S_241110.jpg[/img] [size=150]Valles Marineris: The Grand Canyon of Mars[/size][/url]

[b] Explanation: [/b] The largest canyon in the [url=https://science.nasa.gov/solar-system/]Solar System[/url] cuts a wide swath across the face of [url=https://science.nasa.gov/mars/]Mars[/url]. Named [url=https://youtu.be/JUbQM47QXwQ]Valles Marineris[/url], the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the [url=https://en.wikipedia.org/wiki/Grand_Canyon]Earth's Grand Canyon[/url] in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the [url=https://en.wikipedia.org/wiki/Valles_Marineris]Valles Marineris[/url] remains [url=https://vignette1.wikia.nocookie.net/theevilliouschronicles/images/8/85/Confused-cat.jpg]unknown[/url], although a leading hypothesis holds that it started as a [url=https://apod.nasa.gov/apod/ap980310.html]crack[/url] billions of years ago as the planet cooled. Several geologic processes have been identified in [url=https://science.nasa.gov/resource/valles-marineris-the-grand-canyon-of-mars/]the canyon[/url]. The [url=http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-mars.html]featured mosaic[/url] was [url=http://nssdc.gsfc.nasa.gov/photo_gallery/caption/marsglobe1.txt]created[/url] from over 100 images of [url=https://science.nasa.gov/mars/facts/]Mars[/url] taken by [url=https://science.nasa.gov/mission/viking/spacecraft-and-science/]Viking[/url] Orbiters in the 1970s.


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