1. Dusty old star offers window to our future --- GD 362 Department of Physics National Tsing Hua University G.T. Chen 2005/10/20

2. GD 362  White Dwarf star  R.A. 17h 31m 34.33s  Dec. +37° 05' 20.6"  Distance: 22~26 pc

3.  It represents the end state of stellar evolution of stars like the Sun  Its progenitor had an original mass about seven times the Sun ’ s  From the death of GD362,it passed two to five billion years based on the cooling rate

4.  This long time frame would explain why there is no sign of planetary nebula from the exclusion of material as the star died  This star is as rich calcium, magnesium and iron elements as the Sun ’ s

5.  From the observation, there is a dust disk around the white dwarf  Why the disk can survive ?  something similar to the asteroid or possibly even a planet around the star is being ground up and broken to feed the star with dust

8.  In the future, our solar system may have the same conditions like this case GD 362

9. Reference  http://spaceflightnow.com/news/ GEMINI OBSERVATORY NEWS RELEASE Posted: September 26, 2005 GEMINI OBSERVATORY NEWS RELEASE Posted: September 26, 2005  http://www.gemini.edu/home.php http://www.gemini.edu/home.php  ApJ 632,119-122, 2005 A dusty disk around GD 362, a white dwarf with uniquely high photospheric metal abundance A dusty disk around GD 362, a white dwarf with uniquely high photospheric metal abundance

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