I read that the gravitational acceleration on Mimas is only around 0.063 metres per second squared compared to around 10 m/s^2 on Earth.
You would think an astronaut would be able to jump off the surface of Mimas and not return.
However, calculations show that the escape velocity on Mimas is around 160 m/s (358 mph), so that wouldn't happen.
You would think an astronaut would be able to jump off the surface of Mimas and not return.
However, calculations show that the escape velocity on Mimas is around 160 m/s (358 mph), so that wouldn't happen.
Cancer a. Everyday we come to contact God knows how many substances that would not been ome 200 years ago, plastic engine oil perfumes paints you name it. I could name 1000. And people wonder why cancer. It's a self inflected wound by humanity.
Things will not change anytime soon. It's only going to get worse.
Things will not change anytime soon. It's only going to get worse.
I think those have been made with Stellarium.
With Stellarium you can travel wherever you want in the known universe then, from there look around at land and space.
It is fun for instance to go on Mimas a satellite of Saturn to see how Saturn looks like and moves.
It is easy to import whatever landscape you like.
The attached image of Saturn was captured by the HST on July 4, 2020, during summer in the planet's northern hemisphere.
Two of Saturn's icy moons are clearly visible: Mimas at right, and Enceladus at bottom.
Back in 1943, Bonestell would have had no idea what Mimas looked like. It was only when the Cassini spacecraft made several close approaches in 2004 that detailed images of the frozen moon were obtained.
The giant Herschel crater makes Mimas look like the Death Star from Star Wars.
Two of Saturn's icy moons are clearly visible: Mimas at right, and Enceladus at bottom.
Back in 1943, Bonestell would have had no idea what Mimas looked like. It was only when the Cassini spacecraft made several close approaches in 2004 that detailed images of the frozen moon were obtained.
The giant Herschel crater makes Mimas look like the Death Star from Star Wars.
Attachments
"Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope." https://stellarium.org/en_GB/
Stellariium wasn't around in 1943!
Last edited:
Don't suggest that to Avi Loeb. Next thing he'll claim that's where the saucers are coming from!
Avi Loeb?
Why have I got to do all the googling around here? 🙁
https://www.theguardian.com/science...avi-loeb-found-proof-of-extraterrestrial-life
I tend to agree.
However, the fact that we live longer and longer makes it likely that we will suffer from cancer (and a host of other maladies). Modern medicine has greatly extended lifespan. I was brought back from death twice; 50 years ago I would have been long gone. And my aunt lived to 106 and had a heart attack. The doctors said they could "fix" it since she was in such great shape (she really was), but she refused treatment and died about a week later.
I got a bit bored with my Lisa Randall Dark Matter book. Heard about a Dark matter candidate and they all start to sound the same...
Interestingly she mentioned that she appeared on The Big Bang Theory as an extra. She was apparently cast as Penny's sister. I looked it up on my boxed set:
That's her in the canteen. 😎
Talking of Big Bangs, I listened to a BBC podcast about Oppenheimer and the Atomic Bomb tonight. The action starts at 27.30.
https://www.bbc.co.uk/sounds/play/p0g7jwvl
There was an soldier's eye witness account of the Bikini Atoll 1950's H-Bomb test. Ordinary people really had no idea how dangerous radiation is!
And most of them got blown off their feet even 15 miles away! Came up in blisters two days later! 😳
Interestingly she mentioned that she appeared on The Big Bang Theory as an extra. She was apparently cast as Penny's sister. I looked it up on my boxed set:
That's her in the canteen. 😎
Talking of Big Bangs, I listened to a BBC podcast about Oppenheimer and the Atomic Bomb tonight. The action starts at 27.30.
https://www.bbc.co.uk/sounds/play/p0g7jwvl
There was an soldier's eye witness account of the Bikini Atoll 1950's H-Bomb test. Ordinary people really had no idea how dangerous radiation is!
And most of them got blown off their feet even 15 miles away! Came up in blisters two days later! 😳
Bill Bryson tells of one soldier, based on the Kwajalein atoll, having to grab onto something solid and hold tight.
And that was more than 250 miles from the blast site at Bikini atoll, indicated by an arrow on the map below.
As Bill Bryson relates it, the native residents of the island of Rongelap [which is directly adjacent to the Bikina atoll] had no other warning than there would be a bright flash and a loud bang just before 7 am.
As the radioactive ash fell on them, the puzzled islanders tasted it to see what it was made of - salt apparently.
Within hours they were severely nauseated and blistering wherever ash had touched their skin. Over the next few days, their hair came out in clumps and some started haemorrhaging internally.
I actually agree, but not just nuclear > we need to embrace a whole arsenal of clean energy methods.
You know there is a very sad & unfortunate situation that made Fukushima break-down and it wasn't the reactor >
It was the simple overlooked situation of having diesel generators located at ground level. They got flooded.
If they were simply located 6 or so meters above ground, the shocking disaster would simply not have happened.
Running into the forest, collecting wood, heating: 1 : 3 to 1 : 5
Coal 1: 20
Gas, oil 1 : 50
Nuclear fission 1 : 100
Wind turbine, solar... 1 : 3 to 1 : 5
The ratio of energy input to energy output
Coal 1: 20
Gas, oil 1 : 50
Nuclear fission 1 : 100
Wind turbine, solar... 1 : 3 to 1 : 5
The ratio of energy input to energy output
Or if the engineers had done what they thought about - open a hatch to let cooling water in - but it wasn't described in the manual - a Japanese always follow the manual - to the bitter end.
//
//
open a hatch to let cooling water in
The trouble is: Here we deal with a sealed enclosure that must not release anything out, and pressure inside must stay under limits.
Water in, ok so far so good, then how do you deal with that water loaded with radioactive materials.
Something must go out and you are stuck with no power from diesel generators.
The trouble is: Here we deal with a sealed enclosure that must not release anything out, and pressure inside must stay under limits.
Water in, ok so far so good, then how do you deal with that water loaded with radioactive materials.
Something must go out and you are stuck with no power from diesel generators.
I am always extremely wary of forum posting on multiples of 20, like herewith 2880... Because it turns the page... and I am no fool.
But tonight is exceptional:
https://en.wikipedia.org/wiki/319_Leona
AFAIK, Betelgeuse may disappear for a few seconds in certain places:
We can only watch and see:
I really have no idea:
But am certainly enjoying my new Steven Weinberg book along with a new Particle Physics book:
I recall Bonsai recommended Steven Weinberg. He has an excellent literary style.
https://www.bbc.co.uk/sounds/play/m0018g79
Recommend to all budding Standard Modelists.
But tonight is exceptional:
https://en.wikipedia.org/wiki/319_Leona
AFAIK, Betelgeuse may disappear for a few seconds in certain places:
We can only watch and see:
I really have no idea:
But am certainly enjoying my new Steven Weinberg book along with a new Particle Physics book:
I recall Bonsai recommended Steven Weinberg. He has an excellent literary style.
https://www.bbc.co.uk/sounds/play/m0018g79
Recommend to all budding Standard Modelists.
Unfortunately, the path of the Betelgeuse occultation does not include the UK, but stretches from Mexico across the tip of Florida, through southern Spain, Italy, and Greece and across Central Asia.
This is an extremely rare, once in a century, event and astrophysicists are very excited about it.
Just as the Sun's corona becomes visible during a solar eclipse, the atmosphere of Betelgeuse will be revealed to astrophysicists during the occultation.
It is hoped that observations will shed light (pun intended) on the 'Great Dimming' and continued brightness fluctuations of the red supergiant.
This is an extremely rare, once in a century, event and astrophysicists are very excited about it.
Just as the Sun's corona becomes visible during a solar eclipse, the atmosphere of Betelgeuse will be revealed to astrophysicists during the occultation.
It is hoped that observations will shed light (pun intended) on the 'Great Dimming' and continued brightness fluctuations of the red supergiant.