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agencies assume astronomers atom-sorting atomic kinetol atomic weight attraction axial extrusion become blaze bands bright band bright lines cause central furnace centre of gravity colliding suns collisions of suns comet complete collision cosmic dust cosmic spark cosmic systems critical kinetol critical velocity dead suns deductions deep grazes density diagram distance double stars doubly variable dynamical energy ensphering shells escape Eta Aquilae expansion explosively hot fact formed gaseous give gravitation heat helium hence hydrogen idea kinetic lessen light gases meteoric swarm miles a second molecular molecules Nova orbit original partial impact phenomena planetary nebulae planets pressure probably problems produce proper motion revolving rotation seen shadow bands similar suns Solar System space spectra spectrograms spectrum speed sphere spindle star clusters stellar suggests Sun's surface temperature temporary stars tend theory thermatol third body tion torn suns unit mass variable stars vast whilst whirling coalescence Wolf-Rayet stars
Page 29 - the cause of these outbursts. It cannot be said that science has up to the present time been able to offer any
Page 29 - What they were, what they are, what they become, are all difficult questions to answer. But the crux of the whole problem concerns the manner of their vivification. A body previously inert is transformed, wellnigh instantaneously, into a
Page xiii - been asked to write a few words of introduction to this volume
Page 6 - although I held South Kensington teaching certificates in thirteen branches of science, I knew but little of Astronomy, so I had to study the subject.
Page 29 - to our sight the most astounding phenomena ever presented to the physical philosopher.
Page 29 - centre of immeasurable intensity. How is the change effected ? What store of energy is laid under contribution to provide the
Page 64 - The third body stands still in space, hence when the centre of gravity is at a similar distance, it acts twice as long on each of the two retreating