Re: Flight speed: How fast to notice rapid night/day change?
- From: "RAK" <raknews@xxxxxxxxx>
- Date: Wed, 20 Jun 2007 18:58:44 +0100
"Nobody" <nobody@xxxxxxxxxx> wrote in message
news:1e75$46790223$cef8887a$14583@xxxxxxxxxxxxxxx
Mxsmanic wrote:
12 PM is noon; 12 AM is midnight.
12:00 is noon. 00:00 is midnight.
The space station goes at about 25,000km/h. They see sunrise and sunset
once per 45 minutes. An aircraft, if it is really lucky with strong
tailwinds, may reach 1000km/h. But to get the effect, it would need to
travel straight east.
Another way to quicken sunset would be to travel north east on december 21
in northern hemisphere (north of 45° latitude).
The northern hemisphere is the half of the planet north of the equator (0°
latitude), NOT just the area north of 45° latitude.
And the southern hemisphere is the half of the planet south of the equator.
Hemi=half.
December 21 is the shortest day in the northern hemisphere, but I don't see
why that makes it the quickest sunset. It should actually be the slowest
one.
The quickest sunrise/sunsets are when the sun is orbiting directly above
you, which on 21st Dec with be along the Tropic of Capricorn, which is about
23° south of the equator. Try visiting a country near the equator (or just
in the tropics) and you will see how much faster sunrise/sunset is there.
And if you go too far north, i.e. north of the Arctic Circle (about 66°
north), on 21st December you won't even get a sunset or sunrise. It'll just
be dark.
--
Posted via a free Usenet account from http://www.teranews.com
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