<FCFORMSHEADER>
<?xml version="1.0"?>

<!DOCTYPE FIRSTCLASS SYSTEM "firstclass.dtd">

<firstclass>

	<fcobject objtype="oConfItem" formid="141" objname="David A. Edwards">

		<field id="8018" index="0" type="number">23032</field>

		<subject index="0" >Re(5): SECOND IMAGE - M51 WHIRLPOOL GALAXY</subject>

		<tonames index="0" >S194 06E real time observing</tonames>

		<tonames index="1" ></tonames>

		<ccnames index="0" ></ccnames>

		<bccnames index="0" ></bccnames>

	</fcobject>

</firstclass>

</FCFORMSHEADER>
Sue Eyre on 15 May 2006 at 22:57 +0000 wrote:
do all spiral galaxies spin the same way and do the arms always trail?

Hi Sue

Actually, the spiral arms have very little to do with rotation of the galaxy!  They are almost static, with the individual stars orbiting the centre, passing through successive arms as they go.