You are right, I've missed this feature of Astrophage. I mainly took in account point that in 30 years it will be Sixth Extinction Event, which I supposed be more like global glaciation. I'll think how to correct my calculations. Thank you for your comment!
In the book that was merely the best guess of scientists based off of algae. Possible it could be much worse than predicted so that doesn't bother me as much. Course 10% would still be apocalyptic
I wonder what the change in climate would've looked like on Rocky's planet. I guess that's harder to simulate since the planet's geography is never discussed at all.
Hm-m... interesting! Let's try to estimate. According to the book: Erid's (planet 40 Eridani A b) mass is 8.5 of Earth's mass, diameter is twice of Earth's, surface g is 20 m/s2, atmosphere is 29 times thicker, average surface temperature is 210 degrees Celsius. According to Wikipedia Erid's (planet 40 Eridani A b) distance from Eridani (star 40 Eridani A) equals to 0.22446 AU, star's luminosity equals to 0.457 of Sun's luminosity. So, Erid's irradiance should be equal to 1361 W/m2 (Earth's) * 0.457 * (1/0.22446)^2 = 12 345 W/m2 (Mercury's irradiance - 9 082 W/m2, Venus - 2 636, Earth - 1 361, Mars - 586). From average temperature we can estimate Erid's albedo - it should be in range 0.8-0.9 (Venus's albedo is 0.76, Earth's - 0.31). There are two contradicting references about at what % infected star's dimming stops. In Chapter 5 it’s said: "They only get to about ten percent dimmer before they stop dimming. We don't know why. It's not obvious to the naked eye, ...". 10% dimming corresponds to decrease Earth's average temperature by 8 degrees Celsius. And in chapter 16 it’s said: "Seventy-two years? Man, I wish Earth had that kind of time. But seventy-two years from now Earth will be a frozen wasteland and 99 percent of the human population will be dead." "Frozen wasteland" corresponds to nearly 50% dimming and decrease of Earth's average temperature to -30 degrees Celsius. So, if Erid's irradiance will decrease by 10% then average temperature should be 198 degrees Celcius (12 degrees cooler). And if it will decrease by 50% then average temperature should be 116 degrees Celcius (95 degrees cooler).
@@MrQwerty3131 Are you sure Erid's gravity is 20m/s^2? I thought it was mentioned that the reason the HM accelerated/decelerated at 1.5g was because that was the maximum gravity that a human can handle continuously, and at the end we see that it's possible to handle Erid's gravity for years.
@@chrisgaming9567 Yep, it's exactly 20.48 m/s2 as stated in the beginning of Chapter 16. It's very interesting question, what range of gravity is acceptable for human. Is, for example, martian or lunar level enough for bones and muscles not to degrade fast. And on the other hand, how high gravity can human survive for long time in different lifestyle (lying or walking)? I think that on Erid he has no choice. As said in chapter 30 "I'm not a young men anymore, and the high gravity of Erid has only made my bones degenerate faster". So looks like humans can adapt to 2g in long-term but paying some price for it.
I’m confused the book stated that the stars dimming leveled off at 10% not loosing half its brightness
You are right, I've missed this feature of Astrophage. I mainly took in account point that in 30 years it will be Sixth Extinction Event, which I supposed be more like global glaciation. I'll think how to correct my calculations. Thank you for your comment!
In the book that was merely the best guess of scientists based off of algae. Possible it could be much worse than predicted so that doesn't bother me as much. Course 10% would still be apocalyptic
I wonder what the change in climate would've looked like on Rocky's planet. I guess that's harder to simulate since the planet's geography is never discussed at all.
Hm-m... interesting! Let's try to estimate. According to the book: Erid's (planet 40 Eridani A b) mass is 8.5 of Earth's mass, diameter is twice of Earth's, surface g is 20 m/s2, atmosphere is 29 times thicker, average surface temperature is 210 degrees Celsius. According to Wikipedia Erid's (planet 40 Eridani A b) distance from Eridani (star 40 Eridani A) equals to 0.22446 AU, star's luminosity equals to 0.457 of Sun's luminosity. So, Erid's irradiance should be equal to 1361 W/m2 (Earth's) * 0.457 * (1/0.22446)^2 = 12 345 W/m2 (Mercury's irradiance - 9 082 W/m2, Venus - 2 636, Earth - 1 361, Mars - 586). From average temperature we can estimate Erid's albedo - it should be in range 0.8-0.9 (Venus's albedo is 0.76, Earth's - 0.31).
There are two contradicting references about at what % infected star's dimming stops. In Chapter 5 it’s said: "They only get to about ten percent dimmer before they stop dimming. We don't know why. It's not obvious to the naked eye, ...". 10% dimming corresponds to decrease Earth's average temperature by 8 degrees Celsius. And in chapter 16 it’s said: "Seventy-two years? Man, I wish Earth had that kind of time. But seventy-two years from now Earth will be a frozen wasteland and 99 percent of the human population will be dead." "Frozen wasteland" corresponds to nearly 50% dimming and decrease of Earth's average temperature to -30 degrees Celsius.
So, if Erid's irradiance will decrease by 10% then average temperature should be 198 degrees Celcius (12 degrees cooler). And if it will decrease by 50% then average temperature should be 116 degrees Celcius (95 degrees cooler).
@@MrQwerty3131 Are you sure Erid's gravity is 20m/s^2? I thought it was mentioned that the reason the HM accelerated/decelerated at 1.5g was because that was the maximum gravity that a human can handle continuously, and at the end we see that it's possible to handle Erid's gravity for years.
@@chrisgaming9567 Yep, it's exactly 20.48 m/s2 as stated in the beginning of Chapter 16. It's very interesting question, what range of gravity is acceptable for human. Is, for example, martian or lunar level enough for bones and muscles not to degrade fast. And on the other hand, how high gravity can human survive for long time in different lifestyle (lying or walking)? I think that on Erid he has no choice. As said in chapter 30 "I'm not a young men anymore, and the high gravity of Erid has only made my bones degenerate faster". So looks like humans can adapt to 2g in long-term but paying some price for it.