rikki
Legendary Member
- Location
- Limestone Coast, South Australia
Even if Antarctica wasn't in the way, it still wouldn't be a straight line, as it would be wrapped around the globe.
Really TRUE odd factoids
- Thread starter Blue Hills
- Start date
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Even if Antarctica wasn't in the way, it still wouldn't be a straight line, as it would be wrapped around the globe.
neil_merseyside
Guru
- Location
- Wirral
Flat earthers will dispute the globe bit...
Beebo
Firm and Fruity
- Location
- Hexleybeef
There’s a route across the North Pole between Alaska and Russia that offers a similar straightish route from Scotland to NZ.
T4tomo
Legendary Member
very tricky sailing across polar ice for the time being though, and if /when it melts to allow boats across, it will open up a whole number of other such sailing routes, like whats left of Scotland to Austria for example.
Mad Doug Biker
Just a damaged guy.
- Location
- Craggy Island
There is a sizeable reward for the first person to return the Hasselblad cameras left on the moon to save weight by the Apollo crews.
Beebo
Firm and Fruity
- Location
- Hexleybeef
In order for the earth to have the gravitational pull of a black hole you would have to compact the mass of the earth into the size of a marble.
That is how dense a black hole is.
That is how dense a black hole is.
newfhouse
Resolutely on topic
Wouldn’t a marble with the mass of the Earth still have the gravitational pull of the Earth, at least at astronomical distances?
Beebo
Firm and Fruity
- Location
- Hexleybeef
Any black hole only has the mass of the original star that formed it.
I’m not an expert on black holes but I think the gravitational influence is all about the event horizon. Which is the area from which light can’t escape.
So a small black hole will have a small event horizon.
Feel free to correct me. I’ve only picked this stuff up from watching documentaries, so could be very wrong.
newfhouse
Resolutely on topic
Gravity correlates to mass so two bodies with the same mass, however configured at human scales, will exert the same gravitational attraction. A ton of feathers has the same mass as a ton of lead.
As I understand it, a black hole event horizon exists because the escape velocity, a function of gravity, exceeds the speed of light. This requires a mass greater than that of our sun.
I believe there is some debate about extra-dimensional effects at quantum scales involving black holes being briefly formed but not sustained. This was the basis of fears about the end of the world being caused by the Large Hadron Collider. As far as I am aware that hasn’t happened yet.
I am not an astrophysicist either, so happy to be educated by someone who is.
Beebo
Firm and Fruity
- Location
- Hexleybeef
If Braverman is correct and 100 million refugees are heading to Britain. It will take over 2,200 years for them to all make it, at the current rate of 45,000 per annum.
So probably not something to really get too upset about.
So probably not something to really get too upset about.
Mad Doug Biker
Just a damaged guy.
- Location
- Craggy Island
A group of rays is called a Fever
View: https://twitter.com/wonderofscience/status/1582725755737448452?s=46&t=XYsEPnkMStZF0MPFmcWkCQ
View: https://twitter.com/wonderofscience/status/1582725755737448452?s=46&t=XYsEPnkMStZF0MPFmcWkCQ
Mad Doug Biker
Just a damaged guy.
- Location
- Craggy Island
A 'gaggle' of geese only refers to them when they are on the ground.
In the air, they are a 'Skein' of Geese.
In the air, they are a 'Skein' of Geese.
