Grand Spiral M51

Grand Spiral M51

The whirlpool blablabla Technical astrophotography - Signal and Signal Noise All astro-photos are composed of multiple frames ("subs") that are combined ("averaged") into a stacked image. Typically, the stacked image will be significantly better than the individual frames. But why this should work is so […]

Small Magellanic Cloud

Small Magellanic Cloud

One of the farthest objects you can see with your bare eyes. Friendly extra-galactic neighbor, passing by. Together with its larger counterpart the LMC these galaxies dominate the lower half of the sky in southerly direction. Viewed from Tivoli Southern Guest Farm, they are (barely) […]

Cassiopeia's Heart

Cassiopeia's Heart

Cassiopeia's heart1)Not to be confused by the heart nebula, a massive star-forming region on the cassiopeia border , the nameless middle star of the conspicuous 'W' in the sky, shows a surprise in this deep image. The big questions of astronomy these days are: what […]

Seven sisters

Seven sisters

A birthplace of stars in the constellation taurus. About the picture Capturing was done over 3 nights, for a total of 10 hours. The telescope was wrapped in thermal blanket to prevent radiative cooling messing up the focus. Capturing was pre-programmed for the nights, with […]

NGC 6744

NGC 6744

Deep in the southern sky lurks a Milky Way analog, seen from a distance. It's called NGC 6744. One of the nice things about using a short and fast refractor is the ability to capture a whole blob of the sky at once, while at […]

NGC7000

NGC7000

"First light" in my new observatory. The mount was poorly polar aligned - about 1 degree off. Inspired by Mark-Jaap ten Hove's idea 1)http://www.mark-jaap.nl/, deepsky section, image of M31 27-08-2014 using 30s subs of using very small sub-times, I decided to give the North America […]

Andromeda Galaxy

Andromeda Galaxy

"Second light" image from my new observatory, with guiding and dew heating. Guiding Lodestar SX (borrowed from Bas - thank you!) WO-Guide scope 200mm F/4 INDI 1.2 on Linux/Debian PHD2 Imaging Dew heaters on guide scope and telescope, powered by lab supply Canon 6D, capturing […]

Sculptor Galaxy

Sculptor Galaxy

Just a few arcminutes over the border of Cetus lies one of the brightest galaxies of the southern sky, the Silver Dollar galaxy in Sculptor. With its declination of -25° it is still visible for most of the norther hemisphere, although for best observing it […]