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Main sequence

by Lewis Carroll
written by Lewis Carroll

Main sequence – one o the main condensations in the Hertzsprung-Ressel diagram, which is the main sequence. It is dominated by the stars that are represented in the diagram. It has the appearance of a narrow strip that encompasses most of the stars represented on it.
The main order moves diagonally across the Hertzsprung-Ressel diagram from the upper left corner, where stars with large luminosities and early spectral classes – “O”, “B” – are displayed – to the lower right corner to stars with low luminosities or late spectral classes – “K”, “M”. The fundamental factor in determining the position of a star on the main sequence is its mass and, to a lesser extent, its age.

Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.

Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.

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