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[AZ-Observing] Re: [EVAC] Mercury, Sun, and Earth Diameters and moon
- From: "Mozdzen, Tom J" <tom.j.mozdzen@xxxxxxxxx>
- To: <AZ-Observing@xxxxxxxxxxxxx>, <evac@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 8 Nov 2006 11:26:21 -0700
Don't forget our moon at 2,000 miles
Diameters:
Sun: 900,000 miles
Mercury: 3000 miles
Earth: 8000 miles
Moon: 2000 miles
Puts Mercury into context of another familiar object.
I'd round the sun to ~1 million miles in diameter. What's 100,000 miles
between friends?
Tom
-----Original Message-----
From: listmoderator@xxxxxxxxxxxxxxxxxxxxxxx
[mailto:listmoderator@xxxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Tom Polakis
Sent: Wednesday, November 08, 2006 9:28 AM
To: AZ-Observing@xxxxxxxxxxxxx; evac@xxxxxxxxxxxxxxxxxxxxxxx
Subject: [EVAC] Mercury, Sun, and Earth Diameters
The most common question we will get when we show the Mercury transit to
the public (after "how much did that telescope cost?") will probably be
about the size of the Sun and Mercury. I have found that one
significant figure is more than enough, and don't use km, even though
metric has been adopted in all other parts of the civilized world.
Diameters:
Sun: 900,000 miles
Mercury: 3000 miles
Earth: 8000 miles
During the transit, Mercury is about two-thirds of the way to the Sun.
Placed at the distance of Mercury, the Earth would appear less than
three times as large as the tiny, black dot.
Tom
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