NGC2997is a face-on unbarred spiral galaxy in the Atlia constellation. It is taken here with a 500mm Ritchey Chretien telescope from the Atacama desert in chile.
My first try at this kind of long time project.
This strange figure, with a shape of an 8 or an infinite, the analemma, is caused by the axial tilt of our planet, and by the elliptical shape of our orbit around the Sun. If we take a picture day by day, always at the same hour, the Sun is not in a fixed position, but it slowly clibs up and then down the curve.
If the Earth had a circular orbit and its axis was at 0° tilt the analemma would not exist, since the Sun will be always in the same place in the sky at a determined hour of the day. If the orbit was circular, but the axis was tilted like our real one, the two lobes of the figure would be equal in dimensions. Instead, if the orbit was elliptical (like in the reality) and the axis was not tilted, the analemma would be only a line that would go from east to west.
Nikon Coolpix P90 Bridge - Astrosolar - Photoshop CC
The Sun on the first day of 2016!
Posted: Sat Jan 02, 2016 7:16 pm
by Efrain Morales
The Sun on the first day of 2016!, January 1st, 15:49ut.
A wide-field narrowband mosaic of the less-often imaged eastern half of the Vela Supernova Remnant in HST palette. Specifically named nebulae (RCW 33, 35, 36, 38, 40) within the overall Gum Nebula are seen from left to right. SNRemnant filaments emitting OIII, as well as the Pencil Nebula (NGC 2736), are portrayed in blue.
NGC 2359 Thor's Helmet Nebula
Posted: Mon Jan 04, 2016 7:46 am
by Kapkowski
Interesting shape, bright OIII nebula in Canis Major.
Taken with Officina Stellare Veloce RH200 , Atik One 9M on ASA DDM 60 - unguided
The Christmas Fullmoon is a rare phenomenon that occurs per 3-4 decades.It last happened in 1977 and I was 3 years old then.The next will be at 2034.So i take this fullmoon tonight for the history of rare events.
The photo is a mosaic of 10 images with telescope + planetary camera.Each photo is a stack of 500 video frames 16 bit.Total 5000 photos.
This photo is captured at Astrotek Observatory Evritania Greece
And one last image just for fun. It's not very spectacular except if you concider that it have been shot in only one single 13 seconds exposure !
Like the other images it have been done with the famous Sony 7s. The lens is a 85 mm Canon used at f/1.6
Juste remeber how hard it was to have such a view of North America 20 years ago.
