2 months until the @greatamericaneclipse. Counting the days. My weekly astrophoto is a shot of the total solar eclipse of March 29 2006. With a very short exposure time (1/2000 for this image shot on Kodak Ektachrome E200 film through a @meadeinstruments ETX90 telescope) you get an image of the prominences (the red "flames") around the solar disk. It's impossible to see these features outside totality unless you use a special kind of telescope like the ones made by @luntsolarsystems. Clear skies!
Jun 22, 2017
For this Thursday’s astrophoto I chose comet C/2007 N3 (Lulin). It peaked in brightness and arrived at perigee for observers on Earth on February 24, 2009, at magnitude +5 (naked eye visibility from a dark place). I took this photo on February 28 2009 from Pauleasca, Romania, with a Canon EOS 30D camera and a Borg 77ED telescope. The image is a stack of 24 one minute images shot at ISO 800. Lulin’s green colour comes from the gases that make up its Jupiter-sized atmosphere. Jets spewing from the comet’s nucleus contain cyanogen (CN; a poisonous gas found in many comets) and diatomic carbon (C2). Both substances glow green when illuminated by sunlight in the near-vacuum of space. Green is a very common colour for comets but you will never see green stars.
Jun 15, 2017
I like the Midnight Sun, but I just adore the night sky. And now I miss it like hell. Here's me observing under the Southern stars at Stardate astronomical camp, in New Zealand. Can't wait to get back there. The bright blob to the left is the Omega Centauri globular star cluster. The dark nebula in the upper part of the photo is the Coalsack, one of the most prominent dark nebulae in the night sky. To the left of it, you can see the Southern Cross. Photo taken with the out of this world @zeisscameralenses Otus 28/1.4 and tracked for 28 seconds at half sidereal speed with the best star tracker out there - the @fornaxmounts LighTrack II.
Jun 11, 2017