May be this information could be useful, in checking some results!
Brij Bhushan Vij <[EMAIL PROTECTED]>
20040405H0330(decimal) AM(IST)
Aa Nau Bhadra Kritvo Yantu Vishwatah -Rg Veda.
*****The New Calendar Rhyme*****
Thirty days in July, September:
April, June, November, December;
All the rest have thirty-one; accepting February alone:
Which hath but twenty-nine, to be (in) fine;
Till leap year gives the whole week READY:
Is it not time to MODIFY or change to make it perennial, Oh Daddy!And make the calendar work with Leap Week Rule! ***** ***** ***** *****
From: "Brij Bhushan Vij" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED], [EMAIL PROTECTED] Subject: On Light Year RE: [USMA:29417] Re: Prefix use outside SI Date: Sun, 04 Apr 2004 07:26:42 +0000
Hooper, sir & friends:
One light year is the distance traversed by light during ONE YEAR at the velocity of light. This is:
(31556925s.18746090784 x 299792458 m =9460528168873465.812531 m); and in terms of New Metre (m' =1/10^5th of 1 degree (earth taken to be radius of 6371 km) works to 8508060427942 892.65201956873821249 m'.
This value, using the interval decimal second (sd) works to: 97059575.2236494927416705 m' per decimal second (1 Day = 24h x100md x100 sd). These are likely to prove ready tools for conversion of astronomical distances, where Earth units need be used.
Brij Bhushan Vij <[EMAIL PROTECTED]>20040404H1295(decimal) PM(IST) Aa Nau Bhadra Kritvo Yantu Vishwatah -Rg Veda. *****The New Calendar Rhyme***** Thirty days in July, September: April, June, November, December; All the rest have thirty-one; accepting February alone: Which hath but twenty-nine, to be (in) fine; Till leap year gives the whole week READY: Is it not time to MODIFY or change to make it perennial, Oh Daddy!
And make the calendar work with Leap Week Rule! ***** ***** ***** *****
From: Bill Hooper <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] To: "U.S. Metric Association" <[EMAIL PROTECTED]> Subject: [USMA:29417] Re: Prefix use outside SI Date: Sat, 3 Apr 2004 16:18:51 -0500
The light year (ly) was defined before the metric system had extended it's range of prefixes to large enough values to cover the distances encountered in astronomy. Astronomers may be faulted for not replacing it with appropriate SI units now, but there was sound reason for creating a very large unit of distance at the time when it was created. (The relation between the distance in light-years and how far back in time we see the object is of interest, but I'm not sure it is over-riding.) Perhaps a better, pre-metric unit could have been created at the time, but that is neither here nor there. Replacing it with the petametre (Pm) is the only issue we need to be concerned with now.
The light-year is equal to 9.461 Pm. Anything measured in light-years may just as easily be measured in petametres. There apparently are distances of interest that are currently expressed in the thousands and millions of light years. These could be expressed in exametres (Em, where 1 Em = 1000 Pm) and zettametres (Zm, where 1 Zm = 1000 Em). But, as it is true with any other widely varying measurements, for comparison sake it is oftern desirable or necessary to use the same unit for all of a particular set. Therefore, in discussing relative distances to stars, other parts of our galaxy and other "nearby" galaxies, the petametre might be used for all of them, despite the fact that the distance to other galaxies goes into the millions of petametres and more.
Distances to ... the nearest star, 38 Pm the center of our galaxy, 280 000 Pm the Andromeda galaxy, 19 000 000 Pm = 19 million Pm
I have not heard of any astronomical distances that were expressed in light-years with SI prefixes attached (e.g. megalight-year).
Regards, Bill Hooper Fernandina Beach, Florida, USA <><><><><><><><><><><><> Make it simple; Make it Metric <><><><><><><><><><><><>
_________________________________________________________________
Get head-hunted by 10,000 recruiters. http://go.msnserver.com/IN/46246.asp Post your CV on naukri.com today.
