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Back to 80s..

This page contains pictures taken with a film camera in 1980s in Sepänkylä, close to Vaasa in Finland.

Left: A meteor in constellation of Cassiopeia 21.8.1982. Meteors are stones which burn in atmosphere when they hit it with speed of 20-30 kilometers per second. Right: Northern Lights are born when charged particles from sun hit the Earth's magnetic field, which guides the particles to hit the upper atmosphere molecules in north and south poles of Earth.

Left: 20 minutes exposure around Polaris 10.10.1982. Earth is rotating. Middle: Venus and Jupiter 30.10.1980. Right: Halos around the Sun 16.6.1982. Halos are born when sun light is redirected by small ice particles in atmosphere.

Series of drawings of the Sun 16-21.7.1980, during the sunspot maximum. The activity of sun changes in 11 year periods.In second row is drawings of the Moon and the telescope Carl Zeiss Telementor 63/840.

Working as a summer student in Geneva CERN year 1989. In this picture there is Delphi detector of LEP-collider, 100 meters underground. The electrons and positrons (matter and antimatter) were accelerated in 27 kilometers long tunnel close to speed of light. Collisions were done in 4 places, one of them this Delphi detector. Conditions in the collision are same as in first second after birth of the Universe in Big Bang. The LEP-collider produced Z and W bosons so that their mass could be determined. The successor of LEP, the LHC is now working and a particle resembling the Higgs particle was found on July 2012.

There is 4 known basic forces:

Electric force: Charged particle like electrons and protons interact with each other. Interaction is transmitted with Photons( Light)

Gravity: Objects with mass pull each other. Higgs boson is assumed to give mass to particles.

Strong nuclear force: Keeps atomic nucleus stable. Nucleus contains protons and neutrons, which are combinations of 3 Quarks. Quarks are kept together with color-force, which is transmitted by exchanging Gluons.

Weak nuclear force: Weak force can change a particle to another. Interaction is done by Z and W bosons.

Below is a printout of the first Z-boson decay, observed by Delphi detector. The Z-boson decay produces a bunch of particles which are curved in strong magnetic field of Delphi detector. To this printout the physics nobelist Carlo Rubbia, leader of CERN at that time, on my request has signed his congratulations.

Copyright (c) for pictures, 2015 Harry Rabb. All rights reserved.

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