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Very!
An upgrade in 1997 doubled the power of the transmitter used for planetary radar studies to one million watts and, combined with the telescope, formed the world's most powerful radar system.
This resulted in images of remarkable resolution for the time, down to 15 metres for asteroids and comets. Arecibo was sensitive enough to detect a steel golf ball at the distance of the Moon or to eavesdrop on a cell phone conversation at the distance of Venus.
Some facts (and a little history) about Arecibo | Cornell Chronicle
Ahh. Now we know why the thing hanging over it weighted 900 tons.
Still, 900 tons sounds too much. I'm with Steve on this.
Not long to wait now in cosmic terms, but hopefully no immediate need to put your life plans on ice!
Estimates vary, but previous interglacial periods have lasted for around 10,000 years. Interglacial - Wikipedia
I suspect we go glacial when the ocean currents change. I was reading that the gulf stream volume is 10x all the rivers in the world. There were some figures given (can remember now) for the amount of heat energy transferred from the equatorial regions in the mid-Atlantic to the far northern latitudes and the numbers were staggering.
The question originally raised by Epicurus to highlight a logical contradiction is now deleted.
Did you know that rain actually heats up the atmosphere?There were some figures given (can remember now) for the amount of heat energy transferred...
About 12.5 x 10^20 kJ per year of the energy absorbed by the oceans is used to evaporate water. As wind moves the water vapour (water in gaseous form) from warmer to cooler regions, the water vapour condenses back to liquid water and releases 2260 J of latent heat per gram of rain to the atmosphere.
I'll maybe find the figures to which you referred if I keep searching long enough!
I found the following figures buried in this article: Popular Science Monthly/Volume 20/March 1882/The Gulf Stream and the Panama Canal - Wikisource, the free online libraryfigures ... for the amount of heat energy transferred from the equatorial regions in the mid-Atlantic to the far northern latitudes
An estimate suggests that the Gulf Stream transfers 5,578,080,000,000 cubic feet of water per hour.
The total quantity of heat transferred from the tropics by this current would amount to 154,959,300,000,000,000,000 foot-pounds per day.
I'll leave it up to you to convert those figures into metric units, but, as they stand, they do look staggering! 😀
No luck with this Jupiter/Saturn thing yet. Weather is just pure cloud here at sunset. Anybody caught it yet?
Thursday might be a clear sky. Tomorrow and Sunday outside possibilities. 🙁
I was watching the Dec 9 exploding SpaceX Starship second stage:
SpaceX Starship prototype exploded, but it's still a giant leap towards Mars
SpaceX - Starship
Engines overheated in the last 10 seconds. Fuel problem. But considered a good test run. Amazing technology.
Thursday might be a clear sky. Tomorrow and Sunday outside possibilities. 🙁
I was watching the Dec 9 exploding SpaceX Starship second stage:
SpaceX Starship prototype exploded, but it's still a giant leap towards Mars
SpaceX - Starship
Engines overheated in the last 10 seconds. Fuel problem. But considered a good test run. Amazing technology.
Good, I wouldn't want this thread to be closed by the moderators!The question originally raised by Epicurus to highlight a logical contradiction is now deleted.
A foot pound is about 0.33 Meter times 4.5 Newton.I found the following figures buried in this article: Popular Science Monthly/Volume 20/March 1882/The Gulf Stream and the Panama Canal - Wikisource, the free online library
An estimate suggests that the Gulf Stream transfers 5,578,080,000,000 cubic feet of water per hour.
The total quantity of heat transferred from the tropics by this current would amount to 154,959,300,000,000,000,000 foot-pounds per day.
I'll leave it up to you to convert those figures into metric units, but, as they stand, they do look staggering! 😀
Equal: 1.5 Joule.
You can calculate the thermal power of the Golf stream from: Watt = Joule per second. And 1 day is 86400 seconds.
I was watching the Dec 9 exploding SpaceX Starship second stage: SpaceX Starship prototype exploded, but it's still a giant leap towards Mars
It can take time to perfect the belly-flop technique!The ingenuity of Starship is that it just “belly-flops” all the way down – a type of free fall in which the atmosphere gradually slows down its speed. As it nears the ground, it should be slow enough for a short flip-and-landing burn to touch down softly on the pad.
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I'll just leave it up to a mathematician! 😉You can calculate...
154,959,300,000,000,000,000 foot-pounds per day.
= 155 10^18 x1.5 Joule per day.
= 155 x 1.5 10^18 / 86,400 Watt
= 2.7 10^15 Watt
= 2,700,000,000,000,000 Watt
= 155 10^18 x1.5 Joule per day.
= 155 x 1.5 10^18 / 86,400 Watt
= 2.7 10^15 Watt
= 2,700,000,000,000,000 Watt
Excellent - very big numbers indeed.
So, should that current be diverted (it’s basically a ‘free’ heat source for all of NW Europe) the impact could be pretty dramatic.
I love this earth science/planetary stuff.
So, should that current be diverted (it’s basically a ‘free’ heat source for all of NW Europe) the impact could be pretty dramatic.
I love this earth science/planetary stuff.
I just realized that article is from 1882 Galu! Impressive.
It was Benjamin Franklin who first exposed the magnitude and benefits of the Gulf Stream IIRC.
It was Benjamin Franklin who first exposed the magnitude and benefits of the Gulf Stream IIRC.
I think we have an outside chance in Portsmouth tonight! Cloud racing in after sunset. Charging up my camera! 😀
Sunday looks better. Ventusky - Wind, Rain and Temperature Maps
Monday to Wednesday look hopeless. Thursday will be difficult due to low altitude.
Sunday looks better. Ventusky - Wind, Rain and Temperature Maps
Monday to Wednesday look hopeless. Thursday will be difficult due to low altitude.
Some blue sky above, but clouds all around the horizon at the moment.
Additionally, I'm unlikely to have a sufficiently unobstructed view of the horizon from the house.
I'll look to the south-west soon, but I don't hold out much hope of seeing the near conjunction.
How and when to see the Great Conjunction of Jupiter and Saturn in December 2020 - the ‘Christmas Star’
Additionally, I'm unlikely to have a sufficiently unobstructed view of the horizon from the house.
I'll look to the south-west soon, but I don't hold out much hope of seeing the near conjunction.
How and when to see the Great Conjunction of Jupiter and Saturn in December 2020 - the ‘Christmas Star’
Interesting, and with some help from his cousin, I read!It was Benjamin Franklin who first exposed the magnitude and benefits of the Gulf Stream IIRC.
This Old Map: Benjamin Franklin's Gulf Stream, 1786 - Bloomberg
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Total cloud cover now, Steve, and pouring with rain!
The best bet is still the livestream from Arizona on the 21st.
The best bet is still the livestream from Arizona on the 21st.
= 2,700,000,000,000,000 Watt
That´s just about what my amplifiers can deliver.
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