"Sytze Stel" wrote in message
ll.nl...


I read the first posting and found nothing wrong. I remember that Mars'
diameter is given as 25 arcseconds. If one looks through a 75 X telescope
the angle becomes 1875 arcseconds or 31 minutes, the diameter of the moon
as we see it with the naked eye.

Am I mad or am I?

Sytze, (80 since a couple of months ago)

Sytze

Gavin was quoting figures that may have been true in 2003, but they are
certainly not this year. The apparent diameter of Mars is no greater than
14 arcseconds this August.

Best wishes, Roger