PrimeGrid
Please visit donation page to help the project cover running costs for this month

Toggle Menu

Join PrimeGrid

Returning Participants

Community

Leader Boards

Results

Other

drummers-lowrise

Advanced search

Message boards : General discussion : Aphelion

Author Message
Profile Michael GoetzProject donor
Volunteer moderator
Project administrator
Avatar
Send message
Joined: 21 Jan 10
Posts: 13648
ID: 53948
Credit: 285,237,625
RAC: 54,414
The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,132,712)Cullen LLR Turquoise: Earned 5,000,000 credits (5,038,114)ESP LLR Turquoise: Earned 5,000,000 credits (6,177,890)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,234,442)PPS LLR Sapphire: Earned 20,000,000 credits (20,751,038)PSP LLR Turquoise: Earned 5,000,000 credits (7,956,186)SoB LLR Sapphire: Earned 20,000,000 credits (36,067,618)SR5 LLR Jade: Earned 10,000,000 credits (10,007,110)SGS LLR Ruby: Earned 2,000,000 credits (3,718,606)TRP LLR Turquoise: Earned 5,000,000 credits (5,084,329)Woodall LLR Turquoise: Earned 5,000,000 credits (5,007,789)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,061,196)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (22,885,121)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,118,303)GFN Emerald: Earned 50,000,000 credits (78,031,938)WW Sapphire: Earned 20,000,000 credits (32,204,000)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 119272 - Posted: 6 Jul 2018 | 12:37:22 UTC

Happy Aphelion Day, everyone -- today the Earth is at the furthest part of its orbit from the sun. We're about 3 million miles further the sun now than we are at perihelion in January. Earth receives 7% less sunlight now than it does at perihelion. Since Earth's orbit is nearly circular, this doesn't affect the seasons much.

By contrast, Mars has a much more elongated elliptical orbit, and receives 31% more sunlight at perihelion than at aphelion. Perihelion on Mars coincides with southern summer, making the southern summer hotter and the winter colder. Conversely, it moderates the northern seasons, making the summer (at aphelion) cooler and the winter warmer. That's why the southern icecap grows larger in winter than the northern icecap.
____________
My lucky number is 75898524288+1

Profile Roger
Volunteer developer
Volunteer tester
Avatar
Send message
Joined: 27 Nov 11
Posts: 1138
ID: 120786
Credit: 268,621,444
RAC: 0
Found 1 prime in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,037,982)Cullen LLR Ruby: Earned 2,000,000 credits (2,015,907)ESP LLR Ruby: Earned 2,000,000 credits (2,232,391)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,088,705)PPS LLR Ruby: Earned 2,000,000 credits (3,173,285)PSP LLR Ruby: Earned 2,000,000 credits (2,539,644)SoB LLR Ruby: Earned 2,000,000 credits (2,122,524)SR5 LLR Ruby: Earned 2,000,000 credits (2,238,295)SGS LLR Turquoise: Earned 5,000,000 credits (5,024,064)TRP LLR Ruby: Earned 2,000,000 credits (2,125,391)Woodall LLR Ruby: Earned 2,000,000 credits (2,037,732)321 Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,190,731)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (207,387)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,049,697)PPS Sieve Double Bronze: Earned 100,000,000 credits (100,422,123)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (3,227,972)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,021,659)AP 26/27 Sapphire: Earned 20,000,000 credits (20,651,644)GFN Emerald: Earned 50,000,000 credits (57,918,585)PSA Sapphire: Earned 20,000,000 credits (43,298,465)
Message 119273 - Posted: 6 Jul 2018 | 12:55:38 UTC

Milutin Milankovich, a Serbian mathematician, astronomer, and engineer solved the mystery of what caused major ice ages over the last half-million years of Earth's history. He showed that regular changes in Earth's orbit result in periods of lower global temperature, and these periods correspond to the timing of past ice ages.
Here's a visualisation of the Milankovich Cycles to help you understand how changes in the three orbital parameters; Eccentricity, Precession and Tilt affect global temperature:
http://profhorn.meteor.wisc.edu/wxwise/climate/milankovich.html

Profile JeppeSNProject donor
Avatar
Send message
Joined: 5 Apr 14
Posts: 1533
ID: 306875
Credit: 35,605,759
RAC: 10,132
Found 1 prime in the 2020 Tour de Primes321 LLR Gold: Earned 500,000 credits (529,293)Cullen LLR Gold: Earned 500,000 credits (611,298)ESP LLR Silver: Earned 100,000 credits (174,818)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (35,236)PPS LLR Jade: Earned 10,000,000 credits (13,139,353)PSP LLR Silver: Earned 100,000 credits (428,457)SoB LLR Silver: Earned 100,000 credits (466,812)SR5 LLR Silver: Earned 100,000 credits (145,419)SGS LLR Silver: Earned 100,000 credits (112,277)TRP LLR Silver: Earned 100,000 credits (342,501)Woodall LLR Silver: Earned 100,000 credits (109,455)321 Sieve (suspended) Silver: Earned 100,000 credits (175,037)PPS Sieve Bronze: Earned 10,000 credits (10,113)AP 26/27 Bronze: Earned 10,000 credits (12,129)GFN Ruby: Earned 2,000,000 credits (2,059,478)WW Turquoise: Earned 5,000,000 credits (9,640,000)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 119278 - Posted: 6 Jul 2018 | 14:46:53 UTC

What a late aphelion we will have this year. Two hours to go. While the common barycenter of the Earth-Moon system follows nearly the same ellipse each year, sometimes the Moon will be on the outside, and sometimes on the inside, when the aphelion is near. That affects the aphelion time for Earth alone. /JeppeSN

Profile Rick Reynolds
Avatar
Send message
Joined: 13 Aug 10
Posts: 8159
ID: 65483
Credit: 6,711,828,284
RAC: 40,792
Discovered 3 mega primesFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de PrimesFound 12 primes in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de PrimesFound 1 mega prime in the 2021 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,244,909)Cullen LLR Jade: Earned 10,000,000 credits (10,194,451)ESP LLR Turquoise: Earned 5,000,000 credits (9,538,687)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,216,354)PPS LLR Emerald: Earned 50,000,000 credits (73,178,392)PSP LLR Turquoise: Earned 5,000,000 credits (5,151,448)SoB LLR Jade: Earned 10,000,000 credits (10,045,557)SR5 LLR Jade: Earned 10,000,000 credits (14,871,275)SGS LLR Turquoise: Earned 5,000,000 credits (7,860,522)TRP LLR Jade: Earned 10,000,000 credits (11,130,742)Woodall LLR Turquoise: Earned 5,000,000 credits (5,419,909)321 Sieve (suspended) Double Bronze: Earned 100,000,000 credits (101,538,236)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,840,173,136)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Silver: Earned 200,000,000 credits (276,723,135)GFN Double Silver: Earned 200,000,000 credits (349,277,565)WW Double Amethyst: Earned 1,000,000,000 credits (1,431,508,000)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 119279 - Posted: 6 Jul 2018 | 15:29:25 UTC

Too bad it's not cooling the weather in our part of the world.

Message boards : General discussion : Aphelion

[Return to PrimeGrid main page]
DNS Powered by DNSEXIT.COM
Copyright © 2005 - 2021 Rytis Slatkevičius (contact) and PrimeGrid community. Server load 1.81, 1.92, 1.83
Generated 18 Sep 2021 | 8:37:06 UTC