tag:blogger.com,1999:blog-5870357295177628145.post8261344480152667098..comments2023-08-19T04:46:57.560-07:00Comments on Twinkle Twinkle Little Star: Horsehead NebulaIrynahttp://www.blogger.com/profile/05465522029045611540noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-5870357295177628145.post-62084656834751460322011-11-09T18:05:39.496-08:002011-11-09T18:05:39.496-08:00a lot of this stuff actually is in our visible ran...a lot of this stuff actually is in our visible range. when ionized hydrogen recombines, it emits Balmer lines (when an electron transitions from a higher level to n=2, which is often an intermediate step on the way to n=1). these are in the visible spectrum. the blue part of the image is probably a reflection nebula - this occurs because dust scatters blue light (similar to our atmosphere) so dust behind bright stars looks blue because it is reflecting the blue light (also something we can see with our eyes).<br /><br />i wonder what this would look like through the eyepiece of a telescope?Jackiehttps://www.blogger.com/profile/18055164295753326532noreply@blogger.comtag:blogger.com,1999:blog-5870357295177628145.post-40845007961135451182011-10-17T20:23:42.232-07:002011-10-17T20:23:42.232-07:00I remember reading somewhere that people use speci...I remember reading somewhere that people use special filters because it's out of our visible range... I'll look up the details more carefully and try to make that into a post :]Irynahttps://www.blogger.com/profile/05465522029045611540noreply@blogger.comtag:blogger.com,1999:blog-5870357295177628145.post-80159188287343688162011-10-17T20:14:15.123-07:002011-10-17T20:14:15.123-07:00Awesome picture!! I always wonder how retouched/en...Awesome picture!! I always wonder how retouched/enhanced these images are... they MUST be retouched, right???Juliette Beckerhttps://www.blogger.com/profile/15496311467108019749noreply@blogger.com