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Videos (1000) | Sift Talk (37) | Blogs (98) | Comments (1000) |
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BSR (Member Profile)
Your video, Artemis launch to the moon, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.
Artemis launch to the moon
My uncle worked at NASA…he was in charge of all the Apollo moon rocks, allocating them for study, did the cutting of them with a Diamond saw, and later curated the collection for decades. He also helped train the Apollo astronauts on geology so they could collect interesting and new samples and not more of what we already had.
He was also my dad’s roommate at Stanford.
I wonder if he had anything to do with the encased rock….the photo is too low grade to see exactly what you’re talking about.
While waiting for the launch of Artemis they switched to a segment where they showed a moon rock encased in (glass?) It also appears as something else is also encased with it.
https://ibb.co/8sdW4vd
Artemis launch to the moon
While waiting for the launch of Artemis they switched to a segment where they showed a moon rock encased in (glass?) It also appears as something else is also encased with it.
https://ibb.co/8sdW4vd
Artemis launch to the moon
One of these days, Artimus, one of these days…POW! To the moon!
Giant impact could have formed the Moon more rapidly
That's very cool and really pretty, and I've watched it a load of times, but that moon is waaaaaaay closer to the planet than our moon. I know it's slowly moving away from us, but I wouldn't have thought it would have started off that close.
newtboy (Member Profile)
Your video, NASA Launches Artemis I to the Moon Aboard SLS Livestream, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.
99% of Humans Simultaneously in Sunlight
There’s not a strict definition I’m aware of in common English…but “in sunlight”, in my mind, implies DIRECT sunlight….since that’s not what they mean I find it easily confusing if not deceptive.
“In visible sunlight” is more aptly descriptive, but granted, loses some of the punch.
Also…I see the moon in full daylight, sometimes at noon on sunny days (then I might see an eclipse), and sometimes planets rise just after sunrise or just before sunset…in full sunlight. Come again?
If I can see the moon or any of the planets I'm as much in visible sunlight as if I'm indoors. I don't think there's a good strict definition.
99% of Humans Simultaneously in Sunlight
If I can see the moon or any of the planets I'm as much in visible sunlight as if I'm indoors. I don't think there's a good strict definition.
Fudging the definition of “in sunlight” is cheating.
They should have gone with “in visible sunlight”.
President Biden responses beautifully
Joe is just being cocky, his brain goes to the moon and back every day.
President Biden responses beautifully
Translation of ‘Lots Of Luck On His Trip To The Moon’
STAR WARS: ECLIPSE Trailer (2022)
So The Blue Man Group meets Dark Side of the Moon meets Battlestar Galactica meets going to the well for the billionth time? Yay, I guess.
Maliya Kabs is BACK
Maliya should've moon walk out of the frame!
Can Spinlaunch throw rockets into space?
Yeah, 20000ft is roughly 6km. The air density is about 1/2 but from what I can determine that doesn't equal 1/2 air resistance, but something more like 90-95% air resistance of sea level.
Having said that, I haven't studied aerospace engineering, so I might be getting the details wrong.
There are definitely some minor advantages to building on a mountainside, but I don't think they outweigh logistical difficulties under normal circumstances.
The idea has a good bit of scifi (and probably scientific) history behind it though. I believe Heinlein used a railgun cargo launcher from the moon in Moon is a Harsh Mistress and a mountainside sled rocket in one of his earlier books.
Project Rho is a great resource for hard scifi and rocketry research for writers. http://www.projectrho.com/public_html/rocket/surfaceorbit.php is the link to a page that discusses maglev, railguns and rocketsleds.
I’m thinking Mt Chimborazo in Ecuador…at over 20000 ft, it’s peak it the farthest from the center of the earth (while not being the highest above sea level thanks to the equatorial bulge).
Sure, it doesn’t remove air resistance or friction, but halving it, even cutting it by 1/3 is a massive leap in efficiency and negates much of the extreme engineering and materials needed to overcome the friction….plus, as you mentioned, there’s the rotational speed advantage from launching on the equator vs Florida.
Also, while extremely minor, there’s also a slight reduction in gravitational pull at those heights. A joule saved is a joule earned!
Can Spinlaunch throw rockets into space?
At those g forces, with few exceptions, it seems it would be useless to launch most satellites, and it’s definitely not for live cargo.
It would be great on the moon….as a super weapon to blackmail earth with. It could launch all the rocks the Moon Master desires at any earth target….like a moon mortar with unlimited ammo.
I was thinking the same thing.
But I do agree with him that it would be great on the Moon.
Can Spinlaunch throw rockets into space?
I was thinking the same thing.
But I do agree with him that it would be great on the Moon.
To be fair, it’s only meant to throw stuff to the point second stage rockets normally fire. Only 10000g….no problem, right?
Rail guns seem much more reasonable IMO. So does launching from a mountain top to avoid air resistance.