Recent content by Edwin1974

Thank you MrBlizzard for the informative report.

Thank you Lomidrevo. So, either way, it comes down really to obtaining historical heliacal rising times and proper motions of Sirius. Mmm, new thread. Thank you for all your help Lomidrevo, much appreciated. Kind regards Edwin

Thank you Lomidrevo. So sticking to the original storyline, if I wanted to calculate what the length of a stellar year was 6000 years ago using Sirius as a point of reference, how would I go about doing that ? Just asking the question is making me shrink in my seat. Kind regards Edwin

Hi ChrisKnight. That's very kind of you, but I don't think that's necessary. I'm just trying to get my head around ... well ... you can tell by the thread. Somebody will put me straight soon enough ... I hope.:headbang: Kind regards Edwin

I guess my confusion with the matter revolves around how the sidereal year is determined. As I understand it, it takes 365.256363004 ephemeris days (Earth rotations) of 86400 seconds each for Earth to orbit the Sun. An ephemeris day is an imaginary value though because it takes Earth (a)...

Hi there Lomidrevo. Awesome! Could I kindly request a working example of that statement. I would really love to be able to actually calculate the length of a sidereal year going back x-years based upon that statement. How do I do that ? Thank you for spotting that Lomidrevo. Kind regards Edwin

Thank you Phyzguy.

Hi Lomidrevo, thank you for the reply. I don't find any mention of ephemeres days in the article. The article I'm quoting from can be found here [http://adsabs.harvard.edu/full/1990IAUS..141..197B]. Kind regards Edwin.

Thank you for the reply. Kind regards Edwin

Thank you for the reply. Kind regards Edwin

Hi there. Firstly, thank you for taking the time to reply. The reason I’m asking the question is because of the following article I read on the Harvard.edu website. Title: Sidereal Years - Catalogue Uses in Archaeoastronomy Authors: Barlai, K. & Ecsedy, I. Journal: Inertial Coordinate System on...

Hi there :smile: Anybody out there able to explain to me how to calculate what the true length of a sidereal year was about 6000 years ago ? Kind Regards Edwin.

Thank you for all your help here guys. G = (Ve^{2})/2M Kind Regards Edwin

Hi Mark. Thank you for replying to my question. If I square the one side of the equation I get 125075572.2797 and I arrive at the same answer if I square the other side. I should just let you know that my math skill is equal to about 10 to the power of minus 11 ok, so really struggling with...

Hi. I would like to know if it is possible to "reverse engineer" the formula below to find (G) if Ve, M and r are all known values. Ve = sqrt{2GM/r} Ve would be escape velocity, G would be gravitational constant, M would be mass of planet and r would be radius of planet. I hope I am...