Star catalogue revised & refined


	Star catalogue revised & refined

invictus

9-28-2007 8:04 PM

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tags:

astronomy, stars, hipparcos, stars catalogue, science

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/de9705dd-bee0-472e-b3d2-f8720b168e3b/A2FB0F7F-5E4F-40E6-89E2-87AAA930C956/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://news.bbc.co.uk/2/hi/science/nature/7016247.stm" href="http://news.bbc.co.uk/2/hi/science/nature/7016247.stm" style="font-size: 11px;">news.bbc.co.uk</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/2/hi/science/nature/7016247.stm"><FONT size="2">
<TABLE width="203" cellspacing="0" cellpadding="0" border="0" align="right"><TBODY><TR><TD><DIV>
				<IMG width="203" vspace="0" hspace="0" height="260" border="0" alt="Hipparcos (Esa)" src="http://newsimg.bbc.co.uk/media/images/44141000/jpg/_44141937_hipp_esa_203b.jpg" />
				<DIV class="cap">Hipparcos' data underpins the system of cosmic measurement</DIV>
			</DIV>
			</TD></TR></TBODY></TABLE><B>The most accurate catalogue of the distances to more than 100,000 stars has just been released.</B>
</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/2/hi/science/nature/7016247.stm"><FONT size="2">Cambridge astronomer Dr Floor van Leeuwen has spent the past 10 years checking and recalculating data gathered by the Hipparcos satellite.
</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/2/hi/science/nature/7016247.stm"><FONT size="2">It collected the information in the 1990s, but questions were raised about apparent errors in the results.
</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/2/hi/science/nature/7016247.stm"><FONT size="2">Dr van Leeuwen, who saw a flaw in the way Hipparcos worked, has now corrected the star distances.
</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/2/hi/science/nature/7016247.stm"><P>
<FONT size="2">The catalogue (Hipparcos - The New Reduction of the Raw Data) will allow astronomers to probe more deeply into the properties of stars and galaxies.
</FONT></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/2/hi/science/nature/7016247.stm"><P>
<FONT size="2">Astronomers can only determine the physical properties of stars by comparing their luminosity with their distance from Earth. Without an accurate measurement of distance, the star's true luminosity or size cannot be known.
</FONT></P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/A2FB0F7F-5E4F-40E6-89E2-87AAA930C956/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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