A computer simulation at the University of Amsterdam showed that, in dense star clusters, the heaviest stars tend to move towards the centre of the cluster, increasing their chances of colliding with each other, and forming a larger mass. This can lead to
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Two stars that orbit each other are called a binary star system. Some binary systems have spectra which show periodic changes. What is the nickname for such a system, based on the currently-accepted explanation that their spectral variability is due to in
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In some parts of the sky, it appears that there are stars that are out of step with main-sequence stars in terms of stellar evolution. What are these anomalous stars described?
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It is not only individual stars that can be seen to collide with each other. The Cartwheel Galaxy is thought to have been a spiral galaxy similar to our Milky Way before it experienced a collision with another galaxy. What galaxy seems to be on a collisio
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In 2010, it was suggested that our sun may be part of a binary system, with an as-yet-unobserved dwarf star lurking nearby that might be responsible for an ostensible 26-million year cycle of mass extinctions on Earth. What nickname was given to this poss
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About 49 million years ago, in the galaxy called Messier 85, two ordinary stars collided, producing an explosion of a previously-unobserved nature that was detected in 2006. What is the name given by astronomers to this event?
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According to current astronomical theory, a clash of two white dwarf stars may be liable for the creation of stars in our galaxy whose spectra show very little of the most common element in the universe. What extremely light element are they missing?
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A recent computer model suggests that an unusual feature observed near Supernova 1987A, a supernova in the Large Magellanic Cloud, may have been formed when two stars collided prior to the supernova event. What feature is being explained?
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The merging of two neutron stars has been proposed as the source of short-duration GRBs. For what does the acronym GRB stand?
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For most of its existence as an ordinary star, a star is stable, with the inward pressure of its gravity balanced by the pressure from its hot interior. During this stage of its life, it is said to inhabit "The Main _____ ".
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