Earth in the sun's orbit

Greg Neill wrote:

"Carusus" wrote in message
...
http://zebu.uoregon.edu/~soper/Sun/mass.html
gives 2x10^30 as the mass of the sun.
Is this correct?

Not without specifying the units. In this case, kg would
be the units, and the value 2x10^30kg would be a reasonable
approximation to the mass of the Sun. I've seen a figure
of 1.989x10^30kg quoted.

NASA's "Planetary Fact Sheet" for the sun agrees; their figure is
1,989,100*10^24 kg. I'm not sure whether this is supposed to have
seven significant figures or five, but I'd guess the latter.

See http://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html.

--Odysseus