#### Re: The Moon & M 22

galacticprobe

P. S. Your actual mileage may vary!

-----Original Message-----
From: galacticprobe via Groups.Io <LambuLambu@...>
To: BackBayAstro <BackBayAstro@groups.io>
Sent: Sat, Nov 2, 2019 1:27 am
Subject: Re: [BackBayAstro] The Moon & M 22

Roughly speaking... (going on speed of light in a vacuum of 186,282.11 mps for added accuracy).

31,536,000 seconds in one year (standard 365-day Gregorian year)
x  186,282.11
5,874,592,620,960 (light-seconds in one year)
x 10,000 (number of years for light from M22 to reach Earth)
58,745,926,209,600,010 light-seconds from Earth to M22

Or, going by the 365.25-day Julian year:
31,577,600 seconds per year
x 186,282.11
5,882,341,956,736 (light-seconds in one year)
x 10,000 (number of years for light from M22 to reach Earth)
58,823,419,567,360,000 light-seconds from Earth to M22

And now my brain really hurts! (Thanks, Jim!)

Dino.

-----Original Message-----
From: Jim Tallman <jctallman@...>
To: backbayastro <backbayastro@groups.io>
Sent: Fri, Nov 1, 2019 9:17 pm
Subject: Re: [BackBayAstro] The Moon & M 22

:) don't mix apples and oranges. How many light seconds away is M22 :)

Sent from my Verizon, Samsung Galaxy smartphone

On Fri, Nov 1, 2019 at 8:55 PM -0400, "Kent Blackwell" <kent@...> wrote:

The moon & M 22 will both be in the same field of view tonight (Friday November 1). Unfortunately M 22 will be 45 arc-minutes off the "illuminated" side of the moon but it should be fun to look at the two. Wow, the moon is 1.5 light seconds away and M 22 is 10,000 light years distant!

Kent Blackwell

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