Moikka,
Amerikkalaisen muuttujahavaitsijan Mike Simonsenin blogista löytyy loistava juttu tähtiharrastajan kehityksestä (verrattuna tähtien kehitykseen HR-diagrammilla) :grin: http://simostronomy.blogspot.fi/2008/11/simonsen-t-m-diagram.html (http://simostronomy.blogspot.fi/2008/11/simonsen-t-m-diagram.html)
/Juha
Kiitos, oli todella hauska kaavio :rotfl:
"..Even more worrisome is the path taken by the serious astrophotographer. These poor people give up their souls, money and in extreme cases, family ties, to pursue the ultimate images of galaxies and nebulae. The addiction takes hold quickly, and there seems to be almost no limit to the time and money they will invest..."