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Search took 0.00 seconds. Search: Posts Made By: Mike1956
Forum: Navigation 29-01-2017, 23:28
Replies: 41
Views: 5,044
Posted By Mike1956
Re: Celestial Nav?

Just to reiterate....

This thread is about completing a calculation to confirm that rays of light from stars can be considered to be parallel for navigational purposes when they arrive at Earth....
Forum: Navigation 06-01-2017, 23:26
Replies: 41
Views: 5,044
Posted By Mike1956
Re: Celestial Nav?

Thanks StuM and Kelkara for your kind words of encouragement.

Have just had another look through the thread looking for the "missing 8 billion miles post" and found this post. I am wondering why...
Forum: Navigation 06-01-2017, 08:04
Replies: 41
Views: 5,044
Posted By Mike1956
Re: Celestial Nav?

Thank you all,

I must apologise for causing you all this additional explanation. I too have just re read the thread and there is no mention of 8 billion miles anywhere. I reckon all these long...
Forum: Navigation 05-01-2017, 23:29
Replies: 41
Views: 5,044
Posted By Mike1956
Re: Celestial Nav?

I feel I have now managed to determine as accurately as I am able the solution to my problem. (to be fair someone else has done it for me)

I said in my original post "I am no mathematician" this...
Forum: Navigation 03-01-2017, 09:43
Replies: 41
Views: 5,044
Posted By Mike1956
Re: Celestial Nav?

Have just found an online calculator and did the calculation (twice) and my answer is different to 8 billion miles. As I intimated these things are generally beyond me.

Calculation as follows
...
Forum: Navigation 03-01-2017, 09:19
Replies: 41
Views: 5,044
Posted By Mike1956
Re: Celestial Nav?

Thank you for your help. Much appreciated. Sorry for any offence.

Regarding my point about determining a straight line (as opposed to along the curve) to a position 1 minute of arc away from...
Forum: Navigation 02-01-2017, 23:30
Replies: 41
Views: 5,044
Posted By Mike1956
Re: Celestial Nav?

Sorry, I did not realise I would need to explain the method, just seemed obvious.

Yes, need to create a circle with the centre Sirius and Earth/our Sun on the circumference. Calculate the total...
Forum: Navigation 02-01-2017, 08:49
Replies: 41
Views: 5,044
Posted By Mike1956
Re: Celestial Nav?

Fully accept and fully aware of all points raised.

Thing is I simply do not have a calculator to handle the figures I am dealing with. Thought someone on the forum might have.

However pointless...
Forum: Navigation 01-01-2017, 22:09
Replies: 41
Views: 5,044
Posted By Mike1956
Re: Celestial Nav?

Good point!

I will make another attempt at explaining myself.

I should have said rays of light from stars are considered to arrive at the Earth parallel.

Additionally I realised I had missed...
Forum: Navigation 01-01-2017, 07:59
Replies: 41
Views: 5,044
Posted By Mike1956
Celestial Nav?

I understand the light from stars is considered to strike the Earth at the same angle irrespective of our location on Earth. I have no problem with this whatsoever but have become curious to discover...
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