Curious George

23.08.2021 17:39

Why don't you include Venus in the list of planets?

Christos Vournas

24.08.2021 07:49

George, please visit my site page
I have explained there why the faster rotating planet is on average warmer
You may write here, two or more comments together

Ron Clutz

25.07.2021 14:40

Christos, I am glad you appreciate my posts regarding your research. Third, and last one for awhile, is

Christos Vournas

25.07.2021 15:22

Ron, "The table above and graph below shows that Earth’s warming factor is correctly calculated despite ignoring any effect from its thin atmosphere." Thank you!!!

Ron Clutz

23.07.2021 21:01

Christos, I did a second post focusing on Moon and Earth

Christos Vournas

24.07.2021 06:14

Ron, yes, I visited your second post and I liked it very much. Ron, you have the rare ability... thank you very much! And please continue... Christos

Ron Clutz

21.07.2021 21:39

Christos, thank for this work and for linking the address at Climate Etc. I did a synopsis of your findings at my blog is:

Christos Vournas

22.07.2021 07:06

Ron, thank you for doing a synopsis of my findings at your blog.
We are capable now to theoretically calculate planet mean surface temperatures.
Thank you again,


07.07.2020 01:13

Sir, did you derive this formula, or is it from a book or article on planetary science?

Christos Vournas

07.07.2020 22:05

Thank you, Craig. Yes I derived this formula.

Ireneusz Palmowski

10.12.2019 18:32

Can anything be said about the effective surface temperature of Venus? What do you think about it?

Ireneusz Palmowski Palmowski

11.12.2019 08:16

I gave such an answer at

Christos Vournas

10.12.2019 19:38

Φ=1 for Venus' absorption budget. Jabs = (1-a)Sπr². A Planet Effective Temperature Complete Formula is for a planet-without-atmosphere. We apply it only on very thin atmosph Earth's and Titan's cases.

Ireneusz Palmowski

08.12.2019 14:41

Thank you. I showed your page on Dr. Roy Spencer's blog and WUWT. Greetings.

Christos Vournas

08.12.2019 12:54

The calculations of solar radiation reflection are based on the smooth spherical shape for Φ=0,47. For albedo are based on the surface features. Φ=1 is for gaseous - no surface to reflect planets.

Ireneusz Palmowski Palmowski

08.12.2019 09:45

"N rotations/day, is planet’s sidereal rotation period"
I ask for an explanation.
I understand that this is the most important point of your equation.

Christos Vournas

08.12.2019 12:45

Thank you Ireneuzs. N rotations/day is N rotations/24 hours. The faster - the higher is its average temperature. N and pc influence the way a solar irradiated blackbody surface interact with the S .

Christos Vournas

06.12.2019 20:25

Ireneusz, feel free to ask me anything. And thank you for asking.

Ireneusz Palmowski

08.12.2019 09:26

Thank you for your answer. Can you explain what the calculations of solar radiation reflection are based on? Yes for a layman.

Ireneusz Palmowski

06.12.2019 13:27

"The planet surface solar irradiation accepting factor Φ (the spherical surface’s primer geometrical quality). For Mercury, Moon, Earth and Mars without atmosphere Φ = 0,47."
Can you explain this?

Christos Vournas

06.12.2019 20:21

The solar irradiation reflection, when integrated over a planet sunlit hemisphere is 0,53 [ ( 1- a) S ].
The fraction left for hemisphere to absorb is Φ = 1 - 0,53 = 0,47, or Jabs = Φ (1 - a ) S