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.

Highlights!

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

Contents:

• NewsHigh lights on Astrofriend's homepage October 20, 2025
• Astrophoto databaseLatest astrophotos October 18, 2025
• CometsGreat comets coming in the future October 5, 2025
• New linksInteresting information November 3, 2025
• Speech, Events and articles(English/Swedish) October 16, 2025

News:

Here I have collected news about my travels, astronomy, cars, history etc.

October 20, 2025 Astronomy: Project

• I have used my push pull focuser two years now and it has worked almost perfect. Can it be more developed and simplified ?

  astronomy/ projects/ project-focus-pushpull/ 05-project-focus-pushpull
  (Simplified push pull focuser)

Other astronomy projects

16:e oktober, 2025 Fysik

• Nu är det dags för årets Julföreläsning i gammal tradition. Missa inte detta roliga och intressanta arrangemang och ta med era barn, de kanske blir inspirerade att studera på Fysikum i framtiden. Ingen anmälan och fri entré.

  https://www.su.se/ fysikum/ ...

  Datum:
  4:e december, kl 18-20
  Plats:
  AlbaNova FR4 (Oskar Klein): Roslagstullsbacken 21

October 13, 2025 Astronomy: Project

• I have ordered a duo 7 nm narrow band filter and to make it fit I have to make some adapters between camera and lens/telescope:

  astronomy/ projects/ project-ts130-nikon/ 01-project-ts130-nikon.html
  (TS130 refractor to Nikon D800)

Update:
Aberration analyze, page 5

Other astronomy projects

30:e september, 2025 Fysik

• Som bekant har ju teleskopvisningarna på Alba Nova legat nere under en tid. Nu installeras ett nytt teleskop för att råda bot på den krånglande tekniken:

  astronomy/ astronomy-articles/ astronomy-events-reports.html
  (Nytt teleskop på Alba Nova)

September 29, 2025 Astronomy: Project

• I have updated this project page with KStars 64-bit setting for the ZWO ASI120 USB2 camera:

  astronomy/ projects/ project-asi120mm-upgrade/ 01-project-asi120mm-upgrade.html
  (ZWO ASI120 USB2 upgrade)

Other astronomy projects

24:e september, 2025 Historia, Nya Slussen byggs upp

• Södermalmstorg får träd.

  history/sverige-stockholm-slussen/ sverige-stockholm-slussen-start.html
  (Södermalmstorg får träd, Stockholm)
  

Senaste Slussen promenad längst ned på sidan.

Andra platser om Sveriges historia

23:e september, 2025 Astronomi, Historier

• Jag åker med Rolf ut till Tyresta för astrofotografering. Rolf fotar galaxhopar medans jag gör en timelapse i området runt polstjärnan:

  astronomy/ astronomy-stories/ astrofriend-night-diaries/ astrofriend-night-diary-20250923-se.html
  (Timelapse i Tyresta, september 2025)

Andra astronomihistorier

14:e september, 2025 Historia, Stockholm

• Med fint väder i början på september ger vi oss ut till Beckholmen vid Djurgården. Vi ska lyssna på ett föredrag om segelfartyg. Här finns också bilder från år 2005 som jämförelse:

  history/ stockholm-beckholmen/ 01-stockholm-beckholmen.html
  (En promenad på Beckholmen, Djurgården)

September 4, 2025 Travel Sweden

• A cruise to Ystad and Visby in Sweden, 2025:

  travel/ sweden/ ystad-visby-2025/ 01-ystad-visby.html
  (Southern and East of Sweden, 2025)

Other travels in Sweden

August 28, 2025 Home Theatre

• Now retired and I'm in need of new toys. Some upgrades of the Home Theatre system. 4K player, PC, Xbox.

  sound-image/ home-theatre-resurrection/ home-theatre-resurrection.html
  (Home Theatre resurrection, 2019-2025)

Other Sound and Image

18:e augusti, 2025 Historia, Stockholm

• Följ med oss i bilder från vår promenad runt Södermalm. Här håller vi oss i trakterna av östra Mariaberget:

  history/ stockholm-promenad-mariaberget/ 01-stockholm-promenad-mariaberget.html
  (Från Mariatorget till Timmermansgatan)

August 2, 2025 Astronomy, Impact structures (meteorite craters)

• In July we took a trip to Northern Sweden, among other things we visited the impact structures Siljansringen and Dellen, old meteorite craters:

  astronomy/ meteorite-craters/ impacts.html
  (Impact structures, 2025)

Other meteorite craters

August 1, 2025 Travel Sweden

• A trip by car to Northern Sweden, 2025:

  travel/ sweden/ northern-sweden-2025/ 01-nora.html
  (Northern Sweden, 2025)

Other travels in Sweden

June 29, 2025 Travel Sweden

• A visit to Gothenburg, 2025:

  travel/ sweden/ gothenburg-2025/ 01-gothenburg.html
  (Gothenburg, Sweden 2025)

Other travels in Sweden

June 28, 2025 Astronomy, observatory sites

• Slottsskog's observatory, Sweden 2025:

  During a visit to Gothenburg we visited Slottskogen's observatory:

  astronomy/ observatory-sites/ slottsskogs-obervatory/ slottsskogs-observatory.html
  (Slottsskog's observatory, Gothenburg, Sweden 2025)

Other observatory sites

June 17, 2025 Astronomy, observatory sites

• Boberg's observatory, Sweden:

  In Stockholm at Skansen you find Boberg's observatory:

  astronomy/ observatory-sites/ bobergs-observatory-skansen/ bobergs-observatory-skansen.html
  (Boberg's observatory, Skansen, 2025)

Other observatory sites

20:e maj, 2025 Historia, Älvsjö

• Jag är uppväxt med Stockholmsmässan och nu planerar de att riva den. Jag ger mig iväg med kameran för att ha några minnen från den:

  history/ alvsjo-stockholmsmassan/ alvsjo-stockholmsmassan-sv.html
  (Stockholmsmässan i Älvsjö)

May 16, 2025 Travel Sweden

• Roslagsrundan, with old train, bus and steamship. Six years later I try to remember all nice places we visited on this travel, 2019:

  travel/ sweden/ roslagsrundan-2019/ roslagsrundan.html
  (Roslagsrundan, Sweden 2019)

Other travels in Sweden

6:e maj, 2025 Historia, Älvsjö/Fruängens

• Stockholm försvarades under andra världskriget av flera luftvärn. Ett av dom var placerat i södra förorten Fruängen. Dit tog vi en promenad idag:

  history/ fruangen-luftvarn/ fruangen-luftvarn.html
  (Fruängens luftförsvar)

26:e april, 2025 Astronomi, Historier

• Långt fram i april är det inte speciellt mörkt på nätterna. Men jag har inte avslutat astronomisäsongen än. Kometen C/2025 F2 Swan är uppe på himlen och just ikväll råkar det vara klart väder:

  astronomy/ astronomy-stories/ astrofriend-night-diaries/ astrofriend-night-diary-20250426-se.html
  (Kometen C/2025 F2 Swan, april 2025)

Andra astronomihistorier

April 6, 2025 Travel Europe

• Our visit at Mallorca in Spain, 2025:

  travel/ europe/ spain-mallorca-2025/ 01-mallorca.html
  (Mallorca, Spain 2025)

Other travels in Europe

March 29, 2025 Astronomy: Solar eclipse

• On March 29, 2025 we got a partial solar eclipse in Stockholm:

  astronomy/ astronomy-photo/ solar-system/ sun/ solar-eclipse-2025/ solar-eclipse-2025.html
  (Solar eclipse 2025, Stockholm)

Other astronomy photography

March 17, 2025 Astronomy: Project

• Now is time to take a new look at my EQ6 mount. Earlier I installed belt drive to it. Now I want to replace the internal driver with an open source driver, the OnStep driver:

  astronomy/ projects/ project-eq6-onstep/ 01-eq6-onstep.html
  (EQ6 mount and OnStep driver)

Other astronomy projects

March 4, 2025 Music lists

• Update of my favorite music artists, music lists on YouTube:

  sound-image/ song-music-favorites/ favorite-music-list.html
  (Music lists)

Other Sound and Image

February 20, 2025 Cars, Chrysler Crossfire:

• Rust is one of the most boring things about old cars. Here I take a look at common places where it can be rust on a Crossfire:

  vehicles/ my-cars/ chrysler-crossfire/ rust-protection/ 01-rust-protection.html
  (Rust problem and protection)

Other Crossfire DIY

February 19, 2025 Astronomy: Project

• Do you also have these black holes on your camera's sensor ? It could be dust but in this case it's dryer stains. After I had clean the sensor it's okay, but only one night outdoors and I get a couple of new stains, very frustrating. Here I do an attempt to avoid to get new stains:

  astronomy/ projects/ project-dew-sensor/ 01-dew-sensor.html
  (Dryer stains on the camera sensor)

Other astronomy projects

December 15, 2024 Sound, Music

• A streamer for music must be good to have. A bit expensive but can easily be built around a Raspberry:

  sound-image/ raspberry-musicstreamer/ raspberry-musicstreamer.html
  (Raspberry Music Streamer)

Other Sound and Image

6:e december, 2024 Fysik

• Efter några års uppehåll var äntligen Universitetets Julföreläsning tillbaka. Carl-Olof och Max Kesselberg framför sin fysikshow i Michael Faradays anda:

  astronomy/ astronomy-articles/ physics-show-2024/ physics-show-2024-sv.html
  (Julföreläsning i fysik med Carl-Olof och Max i Faradays mångåriga tradition)

12:e november, 2024 Historia, Fruängen

• Under min uppväxt i Älvsjö under 1960-talet åkte vi ofta till Fruängen och dess moderna centrum. Dagens bilder med gamla minnen:

  history/ fruangen-centrum/ fruangen-centrum.html
  (Fruängens centrum)

November 28, 2024 Astronomy: Tutorial

• A year ago I started to use Siril for my pre processing astrophoto work. Works very well and I use it lot now:

  astronomy/ tutorials/ tutorial-siril/ 01-tutorial-siril.html
  (How to use Siril for pre processing astrophotos)

Other astronomy tutorials

November 28, 2024 Astronomy: Tutorials

• A common problem when processing astrophotos is how to handle nebulas and stars. Totally different demands how to process. One way to solve that is to split up the image in two parts, one Star image and one DSO image. It can be done in Gimp with mask technique. I wrote about it before but now the tutorial is updated:

  astronomy/ tutorials/ tutorial-gimp-astrophotography/ 31-tutorial-gimp-astrophotography-separation-stars-dso-1.html
  (Gimp: Separation of stars and DSO)

Other astronomy tutorials

November 24, 2024 Astronomy: Project

• Bracket frame 3D-printed. protection for cameras USB connector:

  astronomy/ projects/ project-small-practical-knobs-brackets/ 07-project-small-practical-knobs-brackets.html
  (Bracket frame for camera's USB connector)

Other astronomy projects

November 13, 2024 Astronomy: Tutorials

• Auroras or Northern Lights is exiting to look at. I didn't understand that they can be so great where I live at latitude 59 degree. Now I'm planning to catch them with my DSLR camera and a wide angle lens. Here is my thoughts about what equipment to use:

  astronomy/ tutorials/ tutorial-aurora-equipment/ tutorial-aurora-equipment.html
  (Equipment for aurora photographing)

Other astronomy tutorials

November 6, 2024 Astronomy: Project

• With modern technology it's easy to get almost a perfect focus. But after a while it start to drift away because of temperature changes. Here is how I handle that problem:

  astronomy/ projects/ project-focus-temperature/ 01-focus-temperature.html
  (Focus and temperature drift)

Other astronomy projects

October 27, 2024 Astronomy: Project

• I have moved what I have written about setting up a Raspberry with a GPS. Latest Raspberry Pi5 with KStars 64-bit, older system and GPS MNEA. They are now collected together here:

  astronomy/ projects/ project-kstars-gps/ 01-project-kstars-gps.html
  (KStars/Ekos/INDI and GPS)

Other astronomy projects

October 27, 2024 Astronomy: Project

• I recently bought a Nikon D800 and an advanced Pentax FA 300 mm ED f/4 lens. My idea is to modify this camera for H-Alpha and replace my Canon 6D. Above that I need to build adapters, enclosures, voltage converters, guide camera, focus mechanism and drivers etc. You can follow the progress here:

  astronomy/ projects/ project-nikon-d800/ 01-nikon-d800.html
  (Project: Nikon D800 / Pentax 645 FA 300mm ED)

Other astronomy projects

October 13, 2024 Astronomy: Project

• I need one more astroserver for my refractor telescope. Very pleased with the Raspberry Pi4 which I used to my earlier astroserver. But now there is a new Raspberry Pi5, more power full and almost the same price. If course I must have that one. It will be setup with 64-bit in mind:

  astronomy/ projects/ project-kstars-raspberrypi5/ 01-project-kstars-raspberrypi5.html
  (Project: Astroserver Raspberry Pi5)

Other astronomy projects

August 24, 2024 Astronomy: 3D-printing Project

• I have sometimes used my polar finder scope when aiming for the polar star. To make it easier I use a right angle prism. To fit that right angle prism to the polar telescope I 3D-printed an adapter I found on www, it worked but a bit wobbly, it could be better. Now I have designed my own adapter which is more stable:

  3d-printing/ 90degree-polarfinder-adapter/ 03-90degree-polarfinder-adapter.html
  (Project: 3D-printed right angle adapter EQ6/HEQ5 mount)

Other 3D-printing projects

August 18, 2024 Car/Motor cycle meetings

• Even if I'm most interested in cars it's always interesting to see other things that moves. This year we visited the event, Mälaren runt. Motorcycles driving around our lake Mälaren:

  vehicles/ malaren-around-2024/ malaren-around-2024.html
  (Lake Mälaren around, 2024)

Other car meetings in Sweden

18:e augusti, 2024 Historia, Stockholm

• Göta Landsväg, landsvägen till och från Stockholm har en tusenårig historia på vissa platser. Här är början på den, från Skanstull till Södertälje:

  history/ stockholm-gota-landsvag/ 01-skanstull-en.html
  (Göta Landsväg i Stockholm)

  Uppdateringar med fotografier på sträckan Årsta till Liseberg, sidorna 3 till 6.

Andra platser om Sveriges historia

July 4, 2024 Car meetings

• Today we visited a car meeting in Trosa and we went there with Ivan and his Chrysler 300:

  vehicles/ trosa-ivan-2024/ trosa-ivan-2024.html
  (Trosa car meeting, 2024)

Other car meetings in Sweden

22:a juni, 2024 Historia, Stockholm

• Skålgropsstenar finner man på många platser i Sverige. Här är några vi besökt i närområdet till oss i Stockholm.

  history/ skalgropsstenar-stockholm/ 01-skalgropsstenar-stockholm-sv.html
  (Skålgropsstenar i Stockholm)

Andra platser om Sveriges historia

16:e juni, 2024 Historia, Älvsjö

• En fin mörk kväll år 2015 gick jag omkring i Älvsjö och fotograferade:

  history/alvsjo-nattvandring/ alvsjo-nattvandring-2015-sv.html
  (Nattvandring i Älvsjö, 2015)

Andra platser om Älvsjös historia

9:e juni, 2024 Historia, Fornborgar

• Idag bestämmer vi oss för att ge oss ut i naturen. I Kagghamara söder om Stockholm skall finnas ett par mäktiga fornborgar, dit åker vi:

  history/ sverige-fornborgar/ kagghamra/ sverige-kagghamra-fornborg-1.html
  (Kagghamra Fornborgar i södra Stockholm, 2024)

Andra platser om Sveriges historia

May 17, 2024 Astronomy: Lens data base

• When using a lens' built in focus motor it could behave different when controlling focus by remote. I have here collected some information from APT forum to get a better overview of which lenses is to prefer to use for astrophoto in that sense:

  astronomy/ tutorials/ database-apt-focus-af-mf-lenses/ database-apt-focus-af-mf-lenses.html
  (Data base: lenses autofocus behavior when remote controlled)

Other astronomy tutorials

May 3, 2024 Photography: Macro

• Long time ago I built a macro setup. Never used it much but now I built version 2 of it, a better working one:

  photography/ macro-photography/ macro-slider-v2/ macro-slider-v2.html
  (Macro photography, slider setup v2)

Other Photography

March 29, 2024 Astronomy: Astrophotos

• After all years my hard drives get full of astro photos, especially them who contain time lapse videos. What to do with them ? I collected all these time lapse videos in a nostalgic tour in Astro time lapse videos:

  astronomy/ astronomy-photo/ time-lapse/ time-lapse-slideshow.html
  (Star shows and Time Lapse videos)

Other astronomy photos

March 27, 2024 Photography: Slide shows

• Updated my page with slide shows, most from Stockholm:

  photography/ slideshows/ photography-slideshows.html
  (Slide shows, mostly from Stockholm)

Other Photography

20:e mars, 2024 Resor till sjöss

Min fars äventyr som sjöman under åren 1937 till 1945:

• 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
  (Min fars äventyr till havs åren 1937 - 1945)

Other history related

February 11, 2024 Technique

• Our NAS server aging. It has to be replaced by something new. I have read a lot of positive comments about setup a Raspberry as a NAS. It has low power consumption which is good with the increased energy prices we have today:

  technique/ raspberry-nas/ 01-raspberry-nas.html
  (Raspberry NAS)

Other about Techniques

January 25, 2024 Astronomy: Astrophoto

• It feels like that it's clouds on the sky every night. Is it really that bad ? I collected every astrophoto I had taken from 2013 until today and sorted they on months. From this I get a clear view which months is best. Note a long clear night I could had taken more than one object. Normal exposure length is 60 minutes per object:

  astronomy/ astronomy-photo/ database/ astronomy-photo-database-statististica.html
  (Astrophoto database statistics)

Note:
I live in a very light polluted area, Bortle Class 9. But anyway it's exciting to take astrophotos.

Other astrophotos

January 15, 2024 Astronomy: Astronomy Project

• I noticed that my old EQ6 project has a lot of visitors. And of course, it's about rebuilding it to belt drive. I have looked through the pages, updated it. Some of the pages has moved to separate project and tutorial pages. Some error in info and misspellings corrected too:

  astronomy/ projects/ project-eq6-dismantling-rebuilding/ 01-eq6-dismantling-rebuilding.html
  (Project: EQ6 Dismantling and rebuilding for belt drive)

Other astronomy projects

11 januari, 2024 Nöjen i Stockholm

Restauranger:

• Här finns listat några restauranger som vi brukar besöka. God mat och hyfsade priser. Nytt är också en lista på restauranger som har pensionärs rabatter. Har inte hunnit besöka dessa själv än:

  pleasure/ restauranger/ resyauranger.html
  (Listor och kartor över restauranger i Stockholm)

11 januari, 2024 Nöjen i Stockholm

Takpubar:

• Kompletterad med några takpubar till. Sommarens projekt blir att besöka några av Stockholms takpubar. De har blivit väldigt populära på senare år. Här har jag listat de mer kända och gjort en karta så ni hittar dit:

  pleasure/ takpubar/ takpubar.html
  (Listor och kartor över takpubar och restauranger i Stockholm)

December 25, 2023 Astronomy: Astronomy Project

• I have some thoughts about a monochrome camera. With that I must have some filters and a filter wheel. Here I'm playing around with the CAD and design that, maybe it can be done:

  astronomy/ projects/ project-filter-wheel/ 01-project-filter-wheel.html
  (Project: 3D-printed filter wheel)

Other astronomy projects

December 13, 2023 Astronomy: Project

• Long time ago I started a Flat Field Calibrator project where I use a LED stripe and 3D-printed parts. Got a lot of problem with the 3D-printer and the project fell in sleep. Now I started it up again:

  astronomy/ projects/ project-flat-calibrator/ 01-project-flat-calibrator.html
  (DIY/3D Flat field calibrator)

Other astronomy projects

March 9, 2023 Astronomy: Project

• This time I take a look at the focus and the temperature, how long time does it take to stabilize ?

  astronomy/ projects/project-pentax645-300ed/ 01-pentax645-300ed.html
  (Pentax 645 300 mm f/4 ED lens)

Other astronomy projects

January 29, 2023 Astronomy: Calculations

• Comet's speed differ from the sidereal rate. In most mounts a correction of the mounts speed can be input. Often these values are expressed in degrees/hour but need to be in arcsec/sec. I have done a calculator that do this conversion on my homepage:

  astronomy/ astronomy-calculations/ angle-conversions/ angle-conversions.html
  (Angle calculations)

Other astronomy calculations

January 16, 2023 Astronomy: Tutorial

• One of my first tutorials I wrote was about how to do a relative guiding on comets. It guide on a star and the computer calculate the offset speed between the star and the comet and correct for that. I have looked through the text and updated links and added more photos. The software has developed a lot but still the principle is the same:

  astronomy/ tutorials/ tutorial-gimp-astrophotography/ 01-tutorial-gimp-astrophotography-introduction.html
  (Comet relative guiding)

Other astronomy tutorials

December 7, 2022 Astronomy, solar eclipse history

• The Solar eclipse 1954 in Sweden:

  I have asked all my friends and relatives if someone have a memory from Sweden's last total solar eclipse 1954. I got an enormous response with lot of stories about this. I have collected them on a separate page and included some other information:

  astronomy/ astronomy-articles/ solar-eclipse-1954/ solar-eclipse-1954.html
  (Solar eclipse 1954 in Sweden)

Other astronomy articles

December 6, 2022 Astronomy: Events reports

• I have collected my Astronomy events reports at one page:

  astronomy/ astronomy-articles/ astronomy-events-reports.html
  (Astronomy Events reports)

Other astronomy events reports

August 21, 2022 Boats / Monalisa

• Stefan has sent me even more photos of his renovation of his boat Ellinor, it's a sister boat to my father's Monalisa:

  vehicles/ everts-cruiser-monalisa/ everts-cruiser-monalisa.html
  (Mahogany cruiser Monalisa)

Other ships and boats

6 juli, 2022 Historia, Stockholm

• Under ett par vandringar i Stockholms Stad med omgivningar har vi undersökt de platser där folk avrättats i gångna tider, Stockholms galgbackar.

  history/ galgbackar-stockholm/ 01-galgbackar-stockholm-sv.html
  (Avrättnings och galgbackar i Stockholm)

Andra saker om Sveriges historia

June 2, 2022 Travel Sweden

• Steam trains are always exiting, I have done two travels with a steam train from Stockholm City to Nynäshamn. Both of them at Christmas. One more visit to the train museum at Nynäshamn:

  travel/ sweden/ nynashamn-steamtrain-2005-2009/ 01-nynashamn-steam-train.html
  (From Stockholm City to Nynäshamn by Steam train, Sweden from 2005 to 2009)

Other travels in Sweden

28 mars, 2022

Mörka observationsplatser: Astronomi

• Örudden på Torö.

  I södra Stockholm på ön Torö är man långt från stadens ljus. Här är några foton från en parkering i naturreservatet:

  astronomy/ observationsplatser/ orudden/ observationsplats-orudden.html
  (Observationsplatser Örudden Torö, Stockholm)

Andra observationsplatser i Stockholm

All other news: News.

September 1, 2021 Bilskrotar kartor:

• För dig med gammal klassisk bil, när reservdelarna inte finns att köpa nya längre så blir man hänvisad till bilskrotarna. Jag har kompletterat mina tidigare listor med kartor för att lättare finna dom:

  vehicles/ bilskrotar/ bilskrotar-sverige.html
  (Bilskrotar Sverige)

Övrigt skrotbilar

April 15, 2021 Astronomy: Project

• My friend Lars B do most of his projects from the very basic, cast worm gears, 3D-print details etc:

  astronomy/ projects/ project-do-it-from-basic-by-larsb/ 01-do-it-from-basic-by-larsb.html
  (Project: Lars B's projects)

Other astronomy projects

Mars 23, 2021 Astronomy

prof Gösta Gahm

I, prof Gösta and Peter at the Sweden Solar system presentation, Gunilla is the photographer.

Something very sad has happen, in January 2021 I got the information that Gösta had passed away. We had known each other for more than 25 years, both I and Gunilla had him as a teacher in more than one of the courses we took in astronomy from 1995 to 2002 and we kept the contact since then. This meeting with the Jupiter model was the last time we saw him and at Christmas I got a greeting from him, since then nothing. Goodbye Gösta, we hope you have a great time up among the stars !

Gösta has one asteroid named after him: 10997 Gahm.

Lars and Gunilla

• astronomy/ astronomy-articles/ sweden-solar-system-jupiter-2019/ sweden-solar-system-jupiter.html
  (Sweden Solar system, Jupiter)
• https://en.wikipedia.org/ wiki/ Gösta_Gahm
  (Gösta Gahm, Wikipedia)

Other astronomy events reports

29 januari, 2021 Resor till sjöss

Nyheter om det år 1940 förlista fartyget S/S Sylvia:

• En släkting till en av de omkomna har hittat till min sida om fartyget S/S Sylvia och har en del att berätta:

  vehicles/ ship-sylvia-1940/ 01-sylvia-sv.html
  (Fartyget S/S blir torpederat år 1940)

Other history related

January 9, 2021 3D CAD

• In this project I make drawings for GT2 pulleys that I will use in my lens focuser's construction:

  3d-printing/ camera-lens-focus-gears/ 01-camera-lens-focus-gears.html
  (Making drawings for GT2 pulleys to lens focuser)

Other 3D Printer and CAD projects

29 juli, 2020 Hobby

• När jag var omkring 9 år köpte min pappa mig min första modellbåt i trä, båten Flamingo från Wentzels. Den har nu efter 25 år på irrfärder hamnat hemma hos mig igen:

  vehicles/ models/ 02-wentzels-flamingo.html
  (Modellbåten Flamingo från Wentzel, hobby)

Andra båtar i full skala

November 8, 2019 Astronomy / seminar

• Seminars "The ALMA Fornax Cluster Survey" by Nikki Zabel.

  How does the galaxy cluster environment affect molecular gas and star formation? 2019
  (Institution of Astronomy, Stockholm's University)

Other speech, seminar and articles

27 januari, 2019 Fornhistoria

• Kartor för fornfynd, det är för dig som gillar att vara ute i naturen och leta efter vår spännande historia.

  Här finner du de nya kartorna:

  history/ sverige-fornlamningar-kartor/ fornlamningar-kartor-sv.html
  (Fornlämningskartor, Sverige)

Other history related in Sweden

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