Month: November 2015

M45 Pleiades

Probably the most famous open cluster, visible by the naked eye is called Pleiades, Subaru, or Seven Sisters. Charles Messier cataloged this DSO under number 45 (M45). This cluster is located in the constellation Taurus. It’s the closest cluster to the Solar system (430 light years), has 8 light years in diameter and it’s characterized by the nebulosity – reflective illumination of the space dust by the blue light of the hot, young stars. The brightest stars have names: Alcyone, Atlas, Electra, Maia, Merope, Taygeta, Pleione, Celaeno, and Sterope.

M45 Pleiades

M15 Globular cluster in Pegasus

Globular cluster in Pegasus is very far from Earth, specifically 33 600 light years and its diameter is approximately 175 light years. It contains more than 100 000 stars.

Most of the globular clusters are quite bright (M15 has magnitude 6.2), therefore there is no long exposure required. On the other hand longer exposures might overexpose the core, therefore I selected exposure time to 2 minutes.


IC1805 Heart nebula

Visual angle (visual size) of this nebula is several times bigger than visual angle/size of the full Moon; therefore I had to use the shortest focal length I have available. For DSOs like that I have small newton telescope with aperture 150 mm and focal length 600 mm. The focal length was reduced by ASA reducer to 438 mm.

Heart nebula is very dim DSO; therefore narrow band is good option to get some contrast. I managed to collect a lot of data for all 3 channels: Ha, OIII and SII. Final picture was composed in Hubble palette. This means OIII goes into blue, Ha in green and SII into red channel.


NGC6960 Veil nebula

For the third time I am trying to capture whole Veil nebula, but again, there is part missing. This time I used the smallest telescope, I have at home – newton 150/600, reduced to focal length 438 mm, by ASA 0.73 reducer. This picture contain the first picture in left top corner and the second picture in right bottom corner. Anyway, there is still something missing, therefore next time I have to reduce the focal length even more or do a mosaic.


M31 Andromeda galaxy

Andromeda galaxy is the closed galaxy of our home – Milky Way galaxy. The diameter of Andromeda is approximately 220,000 light years; which is twice more than has Milky Way. It’s only 2.5 million lights away and it’s getting closer. The collision with the Milky Way is predicted to happen in approximately 4 billion years.

This DSO is one of the brightest and the biggest, which makes it relatively easy to photograph. This is actually my second attempt of Andromeda galaxy. One year ago with DSLR camera the picture was not looking so great, therefore I was waiting a year and here is the result:

M31 Andromeda galaxy