1. Newbie
Join Date
Sep 2008
Posts
4

## Hello from Lonecat

Hello everybody! This is my very first posting, so I am going to use it say hello to you all and what a pleasure it is for me to be a member of this website. To be be honest, for quite some time I have been under the impression that a website called "Bad Astronomy" could not be anything good. However, just recently I decided to take a closer look and saw what it was all about. I think the idea is not only good but but much needed.
Now here is a question within a question: on which forum should I post the following question with any hope of getting any feed-back? This question is: at what distance from Earth would I have to be if one orbit were to take seven days to complete? Let's say that I am travelling in a spaceship with the mass of a Soyuz vehicle. I wonder if anybody can tell me that or tell me where I should post it. Best wishes from space-mad Lonecat!

2. post it in "questions and answers"

but it should be quite simple really

radius, from center of Earth should be (G*M/((2*pi/(7*24*60*60))^2)^(1/3)

I think, where G is the gravitational constant 6.67*10^-11
and M is the mass of the earth- 5.9736×10^24 kg

154,552,226meters seems to be the answer, ie 154 thousand kms

Though I could be completely wrong... it's happened before.....

3. Newbie
Join Date
Sep 2008
Posts
4

## Distance from Earth

Thanks so much, Frog March. I trust your answer implicitely. Thanks, too for telling me where to go

4. Originally Posted by Lonecat
Thanks so much, Frog March. I trust your answer implicitely. Thanks, too for telling me where to go
no, you should still start a thread there.

It's been a while since I have had any formal education in science.

Although my answer seems about right; it might not be, and anyway I didn't explain how I got it.