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January 20, 2020

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I spend this website many hours each week to share my knowledge and experience from the areas of Astronomy, Cars and Travels. Most pages are written in English that is not my own native language, so do not judge me too hard if you find grammatical errors and more.

Welcome to my home !

Astrofriend's homepage


Highlights!

(these pages could be a mix of Swedish and English)

Contents:


News:

Here I have collected news I found interesting.

Technology, Astronomy, Cars, Travels etc.

January 20, 2020 Astronomy, photography

One of few chances to get a photo of the Orion Nebula from our balcony, it's normally hidden behind the houses:

Other nebulas:

Orion Nebula, M42, 2020

January 19, 2020 Svenska Astronomi, min nattbok

Här kan ni läsa om mitt återuppvakande projekt med AstoImageJ och batch inläsning av raw filer.

Andra astronomi historier:

AstroImageJ Batch reading raw files

January 13, 2020 Astronomy, calculation

Other astronomy calculations:

Minimize vignetting calculator

January 11, 2020 Astronomy, photography

When looking through my old data I found this unprocessed photo, a comet. Very weak and hard to see:

Other comets:

Comet Atlas C/2017 M4, 2018

January 10, 2020 Astronomy, photography

In Southern direction at night from where I live there is an Open Star Cluster, M44:

Other open star clusters:

M44 Open Star Cluster, 2020

January 10, 2020 Astronomy: Tutorial

Have you ever got the experience that your raw astrophotos are in portrait orientation and your software needs them to be in landscape orientation ? This tutorial is about a fix to that problem.

Other astronomy tutorials:

Tutorial: How to rotate raw-files

January 8, 2020 Astronomy: Tutorial

Other astronomy tutorials:

Tutorial: Setup EQMOD and PHD2

January 4, 2020 Svenska Astronomi, min nattbok

När det inte går att observera kanske jag skriver om något annat.

Andra astronomi historier:

M97 Ugglenebulosan

January 5, 2020 Astronomy, photography

At last, a night with clear sky:

Other galaxies:

M106 galaxy with three different setups, from 2014 to 2020

January 2, 2020 Astronomy

Other astronomy projects:

Summer project, dismantling the EQ6 mount and rebuilding

January 1, 2020 Astronomy

  • What is it with our weather ? Clouds and rain every night. The motivation for all amateur astronomers go deep in the ground.

    The last days I have spent on the Gaia space satellite. It's a astrometry observatory with extremely high precision. Could it be used to do something interesting ? I have collected some information here and a simple test by me to start with:

    astronomy/ science-data/ science-data-gaia.html
    (Gaia data archive)

    You can use it as a tutorial how to use the Gaia data.

    Update:
    New calculations of histogram over the positions of nearby stars.

Other astronomy science data archives:

Gaia data archive

30 december, 2019 Sweden Resor till sjöss

Min fars äventyr som sjöman under åren 1937 till 1945:

Uppdateringar om fartygen som Skepparen tjänstgjorde på, se sid 18.

  • Vem har inte drömt om att göra en jorden runt resa någon gång i sitt liv. Min pappa Evert gjorde det redan innan han var 20 år fyllda. Han mönstrade på handelsfartyg och hamnade ända borta i Kina och andra länder i Asien. Det här skedde delvis under Andra Världskriget, det var många fartyg som gick under från minor och torpeder, även svenska fartyg. Tre av fartygen han var på förliste pga detta, dock något efter att han mönstrat av. Trevligt nog har jag en hel del bilder till pappas alla berättelser om de här 7 åren till sjöss. Denna spännande historia kan ni följa här:

    travel/ world/ evert-at-sea-1937-1945/ 01-evert-at-sea-start-sv.html
    (My father's adventures at sea, 1937 - 1945)

Other history related:

My father's adventures at sea, 1937 - 1945

December 29, 2019 Travel

Other travels in Europe:

Side at Turkey, 2014

December 19, 2019 Sound & Image

Other Sound & Image:

My favorite songs and music

December 12, 2019 Astronomy, calculation

Other astronomy calculations:

Frank Drake's Equation calculator

December 11, 2019 Travel

Other travels in Europe:

Krakow, 2010

December 6, 2019 Home Theatre

Other Sound and Image:

Home Theatre resurrection, 2019

November 28, 2019 Astronomy

Other observatory sites:

Stockholm's Observatory, 2009

November 23, 2019 Travel

Other travels in Europe:

Steam train from Stockholm to Katrineholm, 2005

November 22, 2019 Travel

Other travels in Europe:

A short visit to Switxerland and Zug, 1988

November 21, 2019 Travel

  • Thirty years ago I and two of my friends did a car travel through Germany and Austria. Very exiting and it was the first time for me to visit Germany and Austria. I have restored the old photograph and written down the story behind them with help of my friend Lars J:

    travel/ europe/ germany-austria-1988/ 01-germany-austria.html
    (Two weeks by car in Germany and Austria, 1988)

Other travels in Europe:

Car travel in Germany and Austria, 1988

January 5, 2019 Astronomy / equipment

Other astronomy links:

 

November 8, 2019 Astronomy / seminar

Other speech, seminar and articles:

Seminar: How does the galaxy cluster environment affect molecular gas and starformation ? by Nikki Zabel

October 6, 2019 Astronomy: Tutorial

Other astronomy tutorials:

Tutorial: Setup off-axis adapter

October 22, 2019 Photography

Other Photography:

Fall in Hagsätra, 2019

October 15, 2019 Astronomy, 3D printer

Update:
Printer calibration
Update 3D printer software

Other astronomy projects:

3D printer, assembling and setup

September 30, 2019 Astronomy

  • My EQ6 mount is good but there are some weak point in the construction. One of them is the Altitude polar align adjustment. When living at 60 degree latitude as I do it doesn't work very well. Here I starting a study of what others have done and what equipment there are to buy to solve this problem:

    astronomy/ projects/ project-eq6-wedge-rebuilding/ 01-eq6-wedge-rebuilding.html
    (EQ6 wedge rebuilding)

Other astronomy projects:

EQ6 wedge rebuilding

September 21, 2019 Astronomy / History

Other Astronomy Photographys:

Meteorite at  Naturhistoriska Riksmuseet, Stockholm 2019eden, 2019

September 13, 2019 Astronomy and Travel

Other travels in Sweden:

MAK Star party 2019 and some other places in middle of Sweden, 2019

September 5, 2019 Astronomy, vignetting of lenses

Other astronomy projects:

Vignetting of lenses and telescopes

September 1, 2019 Astronomy, photography

Other galaxies:

M31, Canon 300 mm f/4

August 16, 2019 Travels / Sweden

Other travels in Sweden:

By car in Blekinge, Skåne and Småland, 2019

July 27, 2019 Cars

Other ships, cars and aircrafts:

A visit to the junkyard in Osby, 2019

18 juli, 2019 Sweden Historia, Slussen

Other history related:

Nya Slussen Stockholm 2019

July 14, 2019 Travels / Sweden

  • One place I always have found beautiful in books is Norrköping and its river Motala Ström. We have travel by car through Norrköping many times but never stopped at the old town center. This day my girlfriend had to visit the archive of Norrköping in her research and I follow to walk in the old city of Norrköping and take some photos:

    travel/ sweden/ motala-strom-norrkoping-2019/ motala-strom-norrkoping-2019.html
    (Walking along Motala Ström in old town of Norrköping, 2019)

Other travels in Sweden:

Walk in old town of Norrköping, 2019

July 9, 2019 Ships

Other ships, cars and aircrafts:

Icebreaker Atle in Frihamnen, 2019

July 3, 2019 Travel, walks with old and new photos

  • One old idea I have is to take old photos and then take new ones from the same place and compare. I have started with the island Riddarholmen in Stockholm. The old photography is from the 19th century. Much more complicated then I first thought, it will take long time, here is the beginning of the work:

    travel/ sweden/ old-and-new-photographs/ introduction-old-and-new-photographs.html
    (Old and new photography from Stockholm)

Other things about Swedish history:

Old and new photography from Stockholm

June 12, 2019 Travel / Walk

Other travels / Walks in Stockholm:

Stockholm City's harbors, 2019

June 7, 2019 Boats / Monalisa

Other ships and boats:

Evert's mahogany cruiser Monalisa

May 19, 2019 Sound / Image

Other things about sound and cinema:

Biograf (Cinema) Sländan Museum, 2019

April 14, 2019 Astronomy

Other observatory sites:

Astronomy Cafe, 2019

27 januari, 2019 Sweden

Nya kartor över fornlämningar: Fornhistoria

Other history related in Sweden:

All other news: News.

Gånggrift Hallarör i Västergötland
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New links:

Here I have collected new links that I found interesting.

Technology, Astronomy, Cars, Travels etc.

September 29, 2019 Astronomy

 

August 20, 2019 Physics

 

August 20, 2019 Physics

 

April 18, 2019 Travel and Astronomy

Astro-tourism, a growing tourist travel area.

  • Astro Tourism:

    links/ links-astronomy-astrotourism.html
    (Astro Tourism, link collection)
  • I have primarily chosen places that I can reach from Sweden within 6 hours by air. Most of them are in Spain.

Andromeda M31 POSS-I

You find above links later on the link page:

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Must do stuff:

Technology, Astronomy, Cars, Travels etc.

(look carefully that it has not been canceled or has a changed date)

November 11, 2019 Astronomy

It happens only 6 times per hundred years !

 

October, 2019 Astronomy

It could be as bright as magnitude +8, you need a big binocular to see it or a camera.

Seiichi Yoshida's home page
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Föredrag: (Stockholm, Sverige) Sweden

This is only for you who live in Stockholm, Sweden or want to travel and make a visit here.

De flesta av de här föredragen hålls i Stockholm. Vanligtvis är de på svenska men ibland på engelska. Läs noga på deras hemsida så att det inte blivit inställt eller flyttat.

Området är naturvetenskap.

31 January to 1 February, 2020

9 december 2019 till 5 januari 2020 Utställning (OBS ! Flyttad till Lidingö stadshus !)

Se även min berättlase om min fars Pettersson kryssare Monalisa.

2019 Visning / Föredrag

Albanova
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