Arno Wielders

Spaceflight, Physics, Astronomy & Off Earth settlement, Archeology, nuclear power (photo: Wiebrig Krakau)

[Arno Wielders @arnouxus]

That's a lot...

[SpaceNews @SpaceNews_Inc]

SpaceX to raise at least $75 billion in IPO https://t.co/fQMNBEiymy

[Arno Wielders @arnouxus]

wow, that's really bad

[Eric Berger @SciGuySpace]

Based on a handful of sources, this is what I've been able to glean about the New Glenn failure this evening in Florida. TL;DR, it's freaking bad.

https://t.co/df6BcfpyF4

[Cady Coleman @Astro_Cady]

#Today we celebrate Sally Ride: America's first woman in #space - an inspiration to me and so many others, born #OTD 5/26/1951 in Los Angeles, California.
https://t.co/3gVd4POk2o
@SallyRideSci @WomenNASA #herstory #YesSheCan #astronaut

[Arno Wielders @arnouxus]

@LionnetPierre @fikocian hmm, I think that's true for any business...

[Arno Wielders @arnouxus]

beautiful

[Scott Manley @DJSnM]

I realized we were missing an important element with this video @SpaceX @EliteDangerous

[Arno Wielders @arnouxus]

absolute improvement!

[Nic Cruz Patane @niccruzpatane]

Starship Heat Shield Comparison Between Flights 10, 11, and 12

[Arno Wielders @arnouxus]

@Gwynne_Shotwell @TheLurioReport congratulations! Well done!

[Gwynne Shotwell @Gwynne_Shotwell]

Congrats and a huge thank you to the SpaceX team that always delivers. This was an incredible first flight of a brand new vehicle. Our collective future flying amongst the stars has become so much closer.

[Arno Wielders @arnouxus]

@esa @esascience @ESA_transport @CNES @Avio_Group Congratulations!!

[Arno Wielders @arnouxus]

@SpaceKoala @AsteroidEnergy really? Only launch? Just shows ignorance

[Arno Wielders @arnouxus]

@ESA_transport @esascience Go SMILE!

[Chris Martz @ChrisMartzWX]

Never take climate activists seriously who oppose nuclear power.

[Kiko Dontchev @TurkeyBeaver]

So so cool!!!!

[Elon Musk @elonmusk]

Starship is the most powerful moving object ever made

[Arno Wielders @arnouxus]

@TheLurioReport @Truthful_ast Not as bad as the US though....

[Arno Wielders @arnouxus]

@SciGuySpace @Ad_Astra_simul especially since I-hab is still in Turin.....

[Arno Wielders @arnouxus]

@NASAWatch @NASAAdmin i-hab has not been delivered as far as I know.

[Owen Lewis @is_OwenLewis]

Researchers just uncovered the strongest evidence yet for a vast ancient ocean on Mars — a massive coastal shelf hidden in the northern hemisphere.

The feature is a wide, flat band of terrain (hundreds of miles across) with gentle slopes and low curvature, wrapping around the northern plains. It closely matches Earth’s continental shelves, which form over long periods as rivers deposit sediment into standing oceans and waves shape the coastline.

Using computer simulations that “dried up” Earth’s oceans to identify the most durable topographic signatures, the team then scanned high resolution Mars orbiter data and found the matching shelf signatures there. Shorelines alone are subtle and sit at inconsistent elevations due to billions of years of sea level change, erosion, volcanism, and wind — but a coastal shelf is far more stable and would only form around a long lived body of water.

Author Abdallah Zaki explained: “It’s very fundamental. If there is an ocean, there must be a shelf. This is a more stable topographic signature.”

The discovery, published in Nature on April 15, 2026, strengthens the case for a stable ocean early in Mars’ history and points to promising new targets for rovers to hunt for ancient coastal sediments that could preserve signs of past habitability.

📸 A. Zaki

[Arno Wielders @arnouxus]

@indepen_media doe niet zo dom. als je er geen verstand van hebt, is het beter om stil te zijn.

[Human Spaceflight @esaspaceflight]

Our Rosalind Franklin rover will be the first ever to drill up to two metres below the surface of Mars, gathering new insights on the Red Planet 🔴